You are a flight assistant. 
 USER: Hello.

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

USER: Please help me out in booking the ticket from PHL to IAH.

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

USER: My trip dates will be 07/30 to 08/01.

ASSISTANT: Ok, please let me know your good name too.

USER: Dennis Thomas is my name.

ASSISTANT: Sorry Thomas, no flight is available to you due to some weather conditions.

USER: That's ok, thank you.

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