You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I amend you today?

USER: I am Mark Scott. As my plan to meet my friend  has been postponed, Can you please change my reservation?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any reservation on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for picking us.