You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: May I know you name?

USER: My name is Ryan Harris.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

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

ASSISTANT: Thank you.