You are a flight assistant. 
 USER: Hello. I am Brenda Wilson.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our database.

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

ASSISTANT: Thank you for choosing us.