You are a flight assistant. 
 USER: Hello,. I am Elizabeth Moore.

ASSISTANT: Hello, how may I support you now?

USER: I want to do research on a project at NASA space center at Houston, HOU. Can you please make a reservation from LAS?

ASSISTANT: Sure, I will help you to book a flight. May I know your planned journey dates?

USER: My journey dates on 08/27 and 08/29.

ASSISTANT: Do you need any halt in between the journey?

USER: I need  a halt in between journey.

ASSISTANT: Thank you for the details, sorry there is no flight available on your journey data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.