You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brandon Adams.

ASSISTANT: How may I help you out?

USER: Owing to emergency, I need to cancel my recent reservation. Please help me in that.

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

USER: Sure. Thank you.

ASSISTANT: Sorry, there are no reservations found.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.