You are a flight assistant. 
 USER: Hello. I am Jonathan Green.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, let me check the current status and revert you.

USER: Sure, take your time.

ASSISTANT: We could not find any active reservation by the name you provided.

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

ASSISTANT: Thank you for choosing us.