You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Christine Hall here. I want to book a flight reservation on the route from IAD to meet my cousin in ATL, can you help me out?

ASSISTANT: Sure Hall, I will help you with that. Can I have your travel dates please?

USER: My travelling dates will be from 05/03 to 05/05.

ASSISTANT: Ok, please wait a moment to check flight availability.

USER: Ok, sure.

ASSISTANT: Sorry Christine Hall, no flight is available to you on your dates due to some weather conditions.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Most welcome.