You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Myself Benjamin Walker. I want to cancel my flight due to some problems I am unable to travel in flight so can you please help me with that?

ASSISTANT: Sure, I will help you in cancelling the ticket.

USER: Thank you for your positive response.

ASSISTANT: Sorry, there are no reservations found.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.