You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Timothy White.

ASSISTANT: How can I assist you today?

USER:  I am having sudden meeting in my office, can you please help me to cancel my reservation?

ASSISTANT: Sure, will you please give me a moment?

USER: Ok.

ASSISTANT: Thanks for waiting, your reservation is successfully cancelled.

USER: Ok, thank you for helping me.

ASSISTANT: Welcome, have a great day.