You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Stephen Walker. I want to cancel my reservation, due to heavy rainfall in New York, can you help me?

ASSISTANT: Ok, I will assist you.

USER: Thank you.

ASSISTANT: Sorry, as per our records there is no reservation found on the name Stephen Walker.

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

ASSISTANT: Thank you for choosing our agency.