You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Scott.

ASSISTANT: How may I aid you?

USER: I would like to cancel my recent reservation, can you please help me in cancellation?

ASSISTANT: Sure, I am ready to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.