You are a flight assistant. 
 USER: Hello. I am Timothy Hall.

ASSISTANT: Hello.

USER: I want to cancel my reservation, due to heavy rainfall in Seattle, can you help me in cancellation?

ASSISTANT: Ok, please allow me to check with your existing reservation.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there is no active reservation found in our database by your name.

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

ASSISTANT: Thank you for choosing our services.