You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Lee.

ASSISTANT: How can I aid you?

USER: I would like to visit NASA Space Center at Houston, HOU. Can you reserve me a flight ticket?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your source code?

USER: My source point is New York, LGA.

ASSISTANT: Can you please share your journey dates?

USER: I am planning to travel on 08/12 and again return on 08/14.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: Thanks for your details, we found a connecting flight with an airline Delta of fare 100 and number 1012. Can I proceed for booking?

USER: Please, proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.