You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I need to cancel my recent ticket because my planned trip is cancelled due to some problem in our family. Can you please assist me in cancelling the ticket?

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

USER: Thank you for your positive response.

ASSISTANT: Sorry, there are no reservations found in our database. May I know your name please?

USER: My name is Melissa Davis. Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.