You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me to cancel my past ticket? Because I am unable to catch the flight.

ASSISTANT: Sure, I will help you in cancelling the reservation. May I know your name please?

USER: Thank you for accepting my request. My name is Betty Adams.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, not a problem with  that. Thank you for your time.

ASSISTANT: Thank you for reaching us.