You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: As I modified my travel dates, please assist me in changing my previous flight reservation.

ASSISTANT: Sure, I am here to assist you. May I know on which name the ticket has been reserved?

USER: I am Emily Robinson.

ASSISTANT: Ok, please wait a while.

USER: Sure, thanks for accepting my request.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Ok, no problem.

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

USER: Thanks for checking.