You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Allen.

ASSISTANT: Allen, how may I help you?

USER: Can you please help me by cancelling my recent reservation?

ASSISTANT: Sure, please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, no reservation is found by your name.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.