You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my recent reservation. Could you help me in booking?

ASSISTANT: How may I guide you?

USER: I want to cancel my reservation.

ASSISTANT: For cancelling your ticket. May I know your name please?

USER: Benjamin Carter here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Benjamin Carter sorry to intimate, no reservation is found with your criteria.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you very much for reaching us.