You are a flight assistant. 
 USER: Hi, I am Brian Smith.

ASSISTANT: Hello. How may I be your assistance?

USER: I am planning to book a flight ticket to Denver CO-DEN, for shopping in 16th street mall, could you help me in booking within 500. I prefer a connection in between the journey.

ASSISTANT: Sure, we are here to make your journey easy.

USER: I would like to start my journey on 01/23 till 01/25.

ASSISTANT: I would like to know your airport codes?

USER: Sure, My journey to travel is from TX-IAH to CO-DEN.

ASSISTANT: We found a flight 1018 in AA airlines and price is 200 with single connection.

USER: Ok, proceed with my booking.

ASSISTANT: Your booking has been done.

USER: Thank you for you help.

ASSISTANT: Thank you for opting us.