You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Scott.

ASSISTANT: How may I help you out?

USER: Owing an emergency, I would like to cancel my reservation. Can you help me?

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

USER: Ok.

ASSISTANT: Sorry, there are no reservations found.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.