You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Benjamin Walker.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry Benjamin Walker, no reservation is available by your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you fro choosing us.