You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Michelle Baker. I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.