You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, please share me your name.

USER: My name is Stephen Mitchell.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on your name to change.

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

ASSISTANT: Thank you for reaching us.