You are a flight assistant. 
 USER: Hello.

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

USER: Could you please help me in flight ticket booking process from JFK to HOU?

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

USER: Thank you for your response, I want to take off on Nov 18 and book my return ticket also on Nov 20.

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

USER: I am ok with any time on that dates.

ASSISTANT: Do you prefer any specific class to travel?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I will prefer direct flight for this journey.

ASSISTANT: Can I have your good name please?

USER: Sure, my name is Thomas Harris.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: Oh! It's ok, no problem. Thank you for your information.

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