You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Mitchell.

ASSISTANT: Nancy, how may I help you?

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

ASSISTANT: Sure, please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation is found by your name.

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

ASSISTANT: Thank you for reaching us.