You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Wilson here.

ASSISTANT: How can I assist you?

USER: Can you please help me in cancelling my recent reservation? As I'm planning to quit my trip.

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found under your name to do cancellation.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for choosing us.