You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Washington, can you please book me a ticket from DTW to IAD?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I am planning my journey on the dates of July 22 and July 24.

ASSISTANT: Do you have any other specifications?

USER: I prefer to depart in the afternoon flight.

ASSISTANT: Please provide your name.

USER: My name is Christopher Miller.

ASSISTANT: We found a flight with an American airlines of flight 1022 in an economy class with depart time 13:00 PM. Can I proceed with the booking?

USER: Please reserve my ticket in this flight.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.