You are a flight assistant. 
 USER: Hello, I am Charles Hall.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Memorial of World Trade Centre in Washington could you help me in booking my flight ticket.

ASSISTANT: Sure, can you please share your journey dates?

USER: My journey is from 03/03 to 03/05.

ASSISTANT: May I know the airport codes?

USER: I would like to fly from DTW to IAD.

ASSISTANT: Do you have any specifications?

USER: Yes, my price is within 1000 with single connection.

ASSISTANT: Please wait a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: We found a flight with Spirit airlines, flight number is 1019 with one connection and price is 100.

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us.