You are a flight assistant. 
 USER: Hi. I am Patrick Garcia.

ASSISTANT: Hello. How may I help you out?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in this?

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

USER: Thank you.

ASSISTANT: Sorry, there are no reservations found.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.