You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Timothy Lewis.

ASSISTANT: Please wait a second. I will check the update.

USER: Sure, take your time.

ASSISTANT: I did not found any reservation on your name to change.

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

ASSISTANT: Thank you for opting us.