You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation, can you please help me with this?

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: I am Melissa Martin.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Melissa Martin, we haven't found any reservation under your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.