Hello.
Hello, how may I aid you today?
Due to some health issues I could not catch my flight at right time, so I need some help to change my existing reservation. Will you help me in changing?
Sure, we are here to help you to change it. Please wait for a while.
I made a reservation earlier on the name of Mary Martin.
Thanks for your time, there was no reservation found on your specified name.
No problem, thanks for your effort.
Thank you for availing us.