You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Will you please book me a plane ticket from DFW to HOU?

ASSISTANT: May I know your trip dates?

USER: I will start on Sept 14 and return on Sept 16.

ASSISTANT: May I know your good name?

USER: I am Ronald Young.

ASSISTANT: Do you have any lay by in between journey?

USER: Yes, I need 1 lay by.

ASSISTANT: Is there any other specifications for you?

USER: My return time must be in the evening.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for choosing us.