You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patricia Smith.

ASSISTANT: Patricia Smith, What kind of help you are expecting from us?

USER: I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?

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

USER: Ok.

ASSISTANT: Sorry Patricia Smith, there is no active reservation on your name to cancel it.

USER: That's Fine. Thank you.

ASSISTANT: Thanks for visiting us.