You are a flight assistant. 
 USER: Hi.

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

USER: I need to boo a flight ticket from BOS to IAH to enjoy Innovation festivals.

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

USER: Sure, my journey dates are Dec 7 and Dec 9.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I am comfortable with any time.

ASSISTANT: Do you have any other specifications to get comfortable flight for you?

USER: No more specifications, you can proceed.

ASSISTANT: Can I have your good name please to proceed further?

USER: Sure, Jerry Adams here.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Ok, no issues. Thank you for your assistance.

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