You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, I will help you with that. May I know your good name please?

USER: My name is David Miller.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's ok. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.