You are a flight assistant. 
 USER: Hello. I am Linda Nelson.

ASSISTANT: Hello, how can I aid you?

USER: I would like to visit Detroit from Washington. Can you help me to book a flight ticket?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please help me with your airport codes.

USER: My source airport code is DC-IAD and my destination airport code is MI-DTW.

ASSISTANT: Ok, when are you planning to travel?

USER: My travelling dates are 05/22 and 05/24.

ASSISTANT: Do you need any halt in between journey?

USER: Yes, I need.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight with Southwest airline in economy class. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been reserved with a fare of 100 and the flight number is 1024.

USER: Thank you for your support.

ASSISTANT: Thank you for choosing us.