You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit National Air and Space in Washington, can you help me?

ASSISTANT: Sure, please provide me your travel dates?

USER: My travel are 06/19 and 06/21.

ASSISTANT: Share your location airport codes?

USER: I want to fly from LAS to IAD.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Here is a flight with 1 connection limit and price is 200. Can I proceed with it?

USER: Yes, please.

ASSISTANT: Your ticket has been booked with 1004 flight number in Delta airlines. May I know your name?

USER: I am Nancy Allen. Thank you for booking.

ASSISTANT: Welcome. Thank you for reaching us.