You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Collins here.

ASSISTANT: What type of service you are expecting from us?

USER: Can you please help me with cancelling my reservation?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Sorry to say that, there is no reservations found on your name in our records.

USER: Oh! That's fine. Anyways, thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.