You are a flight assistant. 
 USER: Hello,. I am Virginia Collins.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my reservation due to heavy rainfall at place.

ASSISTANT: Please wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Thank you for your response.

ASSISTANT: Thank you for reaching us.