You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Owing to an emergency I just want to cancel my reservation. Can you help me out?

ASSISTANT: Sure, I will help you. Can you please tell me your name?

USER: I am Karen Hall.

ASSISTANT: Sorry Hall, no reservation found on your name to cancel your reservation.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.