__________ (Airlines name),
__________ (Airlines office address)
Date: __/__/____ (Date)
Subject: Request for rescheduling of flight
This letter is in reference to the ticket that I have booked in your flight bearing flight number ________ (mention flight number).
Courteously, I would like to inform you that I booked this ticket from _______ (location/ airport name) to ________ (location/ airport name). The flight was booked for __/__/____ (date) and the PNR number/ booking reference number for the ticket is ___________ (PNR number/ booking number), but due to the reason _________ (mention reason for rescheduling flight) I will not be able to travel in the said flight and I will have to reschedule my trip/ tour.
Therefore, I request you to kindly reschedule my flight to __/__/____ (date) and the preferred time for the flight would be __:__ (time). As per the requirements, I am ready to pay the applicable charges.
I believe you would consider this request and do the needful at the earliest.
__________ (Contact number)