You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I amend you today?

USER: I am Sarah Edwards. Owing an emergency want  to cancel my reservation, can you please help me with it?

ASSISTANT: Sure, we are gleeful to help you in cancellation. Please wait for a while, I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting. We are sorry to inform you that, there is no reservation found with your name.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us. Have a good day.