You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you today?

USER: I am Amy Hall, due to an emergency I want to cancel my recent reservation.

ASSISTANT: Sure. Please wait a minute, I will check the reservation on your name to cancel it.

USER: Sure.

ASSISTANT: Thank you for waiting, Unfortunately, there is no reservation found with your specified name.

USER: Thank you, for your helping hand.

ASSISTANT: Thank you for choosing us, Hope to serve you again.