You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Robert Collins. As my meeting has been postponed, can you please change my reservation?

ASSISTANT: Sure, wait for some time.

USER: Sure.

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

USER: No problem. Thank you.

ASSISTANT: Thanks for choosing us.