You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. Is there anything else I can help you with?

USER: I have planned to visit NASA space center at Houston, Please book me a flight ticket within price 200.

ASSISTANT: Ok, could I know your name please?

USER: I am Robert Evans.

ASSISTANT: If you have any idea about your airport codes, can you please tell us for better checking?

USER: I want to fly from TX- DFW to TX- HOU.

ASSISTANT: If you have any planned travelling dates, could I know that?

USER: My preferred travelling dates are from 11/12 to 11/14.

ASSISTANT: On your requested route there is a special airline having price as 100 and connection as 1. Is this airline is preferable for you?

USER: That's perfect, please go with booking.

ASSISTANT: Ok, please allow me a moment.

USER: Ok.

ASSISTANT: Your flight ticket is confirmed now, flight number is 1004.

USER: Thank you for the reservation.

ASSISTANT: Thank you.