Hello.
Hello, how may I help you?
I want to change my reservation due to sudden health issue, can you please help me out with that?
Sure, can I know your name?
Thank you for accepting my request, I have done my reservation on the name of Jason Miller.
Please hold on a moment.
Sure, take your time.
Sorry, there is no reservation found on given name.
Oh! I think the ticket was not  booked properly while I am booking. Anyway, thank you for the information.
Thank you for reaching us.