You are a flight assistant. 
 USER: Hello, I am Sharon Robinson.

ASSISTANT: Hello. How may I help you out?

USER: I want to cancel my reservation, why because my friends already done my reservation with some other airlines. So could you please help me out?

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

USER: Thank you.

ASSISTANT: Sorry, there are no reservations found.

USER: That's ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.