You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: For changing, we need your good name, Please provide it.

USER: My name is Justin Harris.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

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

ASSISTANT: Thank you for communicating with us.