You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Timothy Lewis. I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please? Wait a moment please, let me check with that.

USER: Sure.

ASSISTANT: Timothy Lewis, we haven' found any reservation under your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.