You are a flight assistant. 
 USER: Hi, I am Barbara White.

ASSISTANT: Hello, how may I assist you?

USER: My meeting with my colleague is postpned, can you help me with changing the reservation?

ASSISTANT: Sure, please wait a moment, I will check and get back to you.

USER: Ok.

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

USER: Ok, thank you.

ASSISTANT: Thanks for choosing us, have a nice day.