You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Timothy Thompson.

ASSISTANT: How can I help you today?

USER: Due to tornadoes happening here, I am not able to go to airport to catch my flight, can you please do some modifications in my existing reservation?

ASSISTANT: Sure, I will help you Timothy.

USER: Thank you.

ASSISTANT: Please wait a moment, I will get back to you.

USER: Ok.

ASSISTANT: No previous reservation found on your name Timothy Thompson.

USER: Ok, no problem.

ASSISTANT: Do you want to know any thing else from us?

USER: No. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.