You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I need to change my ticket reservation.

ASSISTANT: OK,may I know your  good name?

USER: Sure, My name is Sarah Carter.

ASSISTANT: OK, I will check and revert you.

USER: OK.

ASSISTANT: Thank you for being patience. Sorry, there is no reservation found on your name.

USER: Thanks for your information.

ASSISTANT: Thank you for connecting with us, have a great day.