You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this minute?

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

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Samantha Allen.

ASSISTANT: Ok, wait for a minute.

USER: Sure, take your time.

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

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

ASSISTANT: Thank you for reaching us.