You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. May I know your name please?

USER: Nancy Thompson.

ASSISTANT: How can I serve you today?

USER: We have planned get together party in Cobo Center in Detroit on 04/18. So, please book a ticket for me.

ASSISTANT: Sure, is there any fare limit?

USER: Yes, my fare limit is 200.

ASSISTANT: Ok, when you want to return from Detroit?

USER: On 04/20, I have to return.

ASSISTANT: Help me with your airport codes?

USER: Dallas & Fort Worth, TX - DFW is my origin airport.

ASSISTANT: Ok.

USER: DTW is my destination airport.

ASSISTANT: Please wait, I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, I found a flight from Southwest airline with price of 100 and 1003 flight number. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for connecting us.