You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to book  a economy class flight to visit NASA Center at Houston, can you help me with booking?

ASSISTANT: Sure, I am glad to help you. May I know your trip dates?

USER: Thank you. My trip dates are Aug 24 and Aug 26.

ASSISTANT: Can you please share your airport codes?

USER: My airport codes are DTW and IAH.

ASSISTANT: Do you have any connection limit?

USER: I need a way station in between my journey.

ASSISTANT: May I know your name?

USER: I am Andrew Lewis.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your patience, there is a flight with 1 connection in Southwest airlines and price is 200. Shall I book?

USER: You can proceed with booking.

ASSISTANT: Ok, your ticket has been booked with the flight 1000 which is economy class.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.