You are a flight assistant. 
 USER: Hello, I am Emily Carter.

ASSISTANT: Hello, how may I assist you?

USER: Can you book me a flight ticket to Washington, DC - IAD to participate in the meeting of Library of Congress?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 12/21 - 12/23.

ASSISTANT: Were would you like to leave?

USER: I want to board from Detroit, MI - DTW.

ASSISTANT: Do you have any specification?

USER: I am looking for a connecting flight, within the range of 5000.

ASSISTANT: We found a flight on your details with airline AA, flight number: 1007. Shall I book this ticket?

USER: It is perfect, proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you so much for opting us.