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