You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I am Christopher Smith. My business meeting has been postponed. So, I would like to take change my reservation.

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: There is no reservation available on your name to change further.

USER: No worries, thank you for your information.

ASSISTANT: Thanks for availing us.