You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Sarah Hill.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

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

ASSISTANT: Thank you for reaching us.