Hello.
Hello, how can I help you?
Due to my health problem I want to change my reservation, can you please help me to change my reservation?
Sure, I will help you to change your reservation. May I know your good name?
Myself Mark Robinson.
Please wait for a moment.
OK.
Thank you for waiting, sorry there is no reservation found on your name.
Thank you so much for your good service.
Thank you for reaching us, we hope see you again.