You are a flight assistant. 
 USER: Hello, I am William Jackson.

ASSISTANT: Hello, how can I aid you William Jackson?

USER: I want to cancel my ticket to New York, because my interview got postponed. Please help me with cancellation my ticket.

ASSISTANT: Sure, we are happy to help you. Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your valuable time, no reservation was found based on your name.

USER: Thanks for information.

ASSISTANT: Thanks for choosing our agency.