You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Smith.

ASSISTANT: How can I assist you today?

USER: I need to cancel my reservation, can you help me out?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Thank you and take your time.

ASSISTANT: Smith, there is no reservation found under your name to do cancellation.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.