You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Sharon Baker. I want to do some modifications in my previous reservation, due to some health issue. Can you please help me?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you for accepting my request.

ASSISTANT:  Can you please give me a moment to check your previous reservation.

USER: Ok, I will wait for your replay.

ASSISTANT: Sorry Baker, there is no reservation is showing on your name to change.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day. Thank you for connecting us.

USER: Welcome.