You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: As meeting with my client has been postponed, can you please change my reservation?

ASSISTANT: Sure, Let me know your name to check the reservation.

USER: I am Carolyn Campbell.

ASSISTANT: Please, wait for a while.

USER: Sure.

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

USER: No problem. Thank you.

ASSISTANT: Thank you for approaching us.