You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Anna Martinez.

ASSISTANT: Ok.

USER: I want to book a flight ticket from CO - DEN to TX - DFW, so please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you. May I have your journey dates?

USER: I would like to fly on 09/16 and return on 09/18.

ASSISTANT: Do you have any other requirements?

USER: My price limit is 200.

ASSISTANT: We found a Spirit airline with a fare of 100.

USER: You can proceed to booking.

ASSISTANT: 1020 flight number which has a connecting flight, in this a seat is reserved for you.

USER: Thank you.

ASSISTANT: Thank you.