You are a flight assistant. 
 USER: Hello, Ashley Lewis here.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel to IAD to visit the National Air and Space Museum which is very famous, could you book the ticket?

ASSISTANT: May I know the airport codes with dates?

USER: My current region is DTW and I want to travel on 08/12 and back on 08/14.

ASSISTANT: There is a flight with number 1027 and airline is UA. Can I book it?

USER: Yes, reserve my ticket.

ASSISTANT: Your ticket is booked. Thank you.

USER: Thank you.