You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation as my plan with my family for lunch has been postponed ,. Can you help me to change my travelling dates?

ASSISTANT: Sure, we are here to help you. May I know your name to change your ticket?

USER: Thank you. I am Richard Lee.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name. Thanks for choosing us.

USER: Ok, no problem. Thank you.