You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I am William Taylor. I am planning to travel from CLT to DFW, help me in booking a flight?

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

USER: I like to travel on 08/15 to 08/17.

ASSISTANT: Sure William Taylor, please wait a moment to check flight availability.

USER: Ok.

ASSISTANT: Sorry William Taylor, no flight is available to you on your dates due to weather conditions.

USER: That's ok, thank you.

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