You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you help me to book a flight ticket from IAD to DTW?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My planned travel dates are July, 23 and July, 25.

ASSISTANT:  Do you prefer any stopover in between journey?

USER: I need connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please help me with your name for booking.

USER: Andrew Mitchell here.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1021. Shall I proceed with this flight?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.