You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

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

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Ok, please check the details on the name of Shirley Walker.

ASSISTANT: Sure, please allow me a moment.

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.