You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Williams.

ASSISTANT: How may I assist you today?

USER: Can you please reserve me a flight ticket from DTW to PHX to visit an arts expo?

ASSISTANT: Sure, let me know your trip dates please?

USER: I am planning to depart on Mar 28 and return on Mar 30.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: Delta airlines with the ticket fare of 100 and a halt in between the journey. Shall I proceed?

USER: Please, proceed.

ASSISTANT: Your ticket has been confirmed by flight number 1020 and an economy class.

USER: Thank you for assisting me.

ASSISTANT: Thanks for choosing us.