You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to cancel my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: Jack Williams here.

ASSISTANT: Please wait a moment I will check the reservation list.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.