You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Barbara Martin here. Can you please help me in booking a flight ticket from IAD to DTW?

ASSISTANT: Sure, please share your depart and return dates.

USER: Sure, my travel dates are from July 26 to July 28.

ASSISTANT: Which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you prefer specific depart and return time?

USER: I need to depart in the afternoon.

ASSISTANT: Sure, please share if you want to add other preference to your journey.

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We have found a flight which departs in the afternoon at 16:00 PM, it is costing 200. Shall I proceed with this one?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed in economy class with Frontier airlines flight , number 1009.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.