You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you cancel my recent reservation?

ASSISTANT: Yes, may I know on which name the ticket has been reserved?

USER: Sure, I am Benjamin Lee.

ASSISTANT: Ok, please wait a minute I will get back to you.

USER: Ok, take your own time.

ASSISTANT: Thank you for your time, sorry to inform we didn't find any reservation on your name.

USER: That's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.