You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need you to cancel my recent booking. Please help me.

ASSISTANT: Sure, may I know your name?

USER: My name is Rachel Johnson.

ASSISTANT: Thank you. Let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: That's ok. Thank you.

ASSISTANT: You are most welcome.