My name is XYZ and I am writing this letter to inform you about a business trip that I cannot go on, as I cannot board the flight number DXB129 because of a mishappening that took place last Monday.
I had to board flight DXB129 from New Delhi to Dubai at 11: 30pm on Tuesday, 17th of November. But I can no longer travel on that day as I met with an accident at my workplace. Actually yesterday in the morning, I was walking from the parking lot to the entrance and my foot tripped and I fell sideways as someone had spilled some water there. I tried to get up but I couldn’t. I realised I had sprained my ankle. Some kind personals who were present there helped me get up and took me to the pharmacy for some first aid. I got a crepe bandage and some anti-inflammatory pills. I then went inside to wait in the waiting lounge. My foot started swelling and I decided to cancel my trip.
I had a business meeting in Dubai which was a very important one. However, when I called and told them about my predicament, they were kind enough to postpone the meeting ahead for 2 weeks.
I hope you will be kind enough to accommodate me on the flight DXB 129 which is to fly on the 24th of November at 11: 30 pm. I am also a member of your frequent flyer programme. I would be very grateful to you for this kind gesture.
Hoping to hear from you soon!
Yours faithfully,
XYZ. 
My name is  
XYZ and
 I am writing this letter to inform you about a business trip that I cannot go on, as I cannot board the flight number DXB129  
because
 of a  
mishappening
 that took place last Monday.
I had to board flight DXB129 from New Delhi to Dubai at 11: 30pm on Tuesday, 17th of November.  
But
 I can no longer travel on that day as I met with an accident at my workplace. Actually yesterday in the morning, I was walking from the parking lot to the entrance and my foot tripped and I fell sideways as someone had spilled  
some
 water there. I tried to  
get
 up  
but
 I couldn’t. I  
realised
 I had sprained my ankle.  
Some
  kind
 personals who were present there  
helped
 me  
get
 up and took me to the pharmacy for  
some
  first
 aid. I  
got
 a  
crepe
 bandage and  
some
 anti-inflammatory pills. I then went inside to wait in the waiting lounge. My foot  
started
 swelling and I decided to cancel my trip.
I had a business meeting in Dubai which was a  
very
  important
 one.  
However
, when I called and  
told
 them about my predicament, they were  
kind
  enough
 to postpone the meeting ahead for 2 weeks.
I hope you will be  
kind
  enough
 to accommodate me on the flight DXB 129 which is to  
fly
 on the 24th of November at 11: 30 pm. I am  
also
 a member of your frequent flyer  
programme
.  
I
 would be  
very
 grateful to you for this  
kind
 gesture.
Hoping to hear from you  
soon
!
Yours  
faithfully
,
XYZ.