You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I am Michelle Collins, can you help me to book a flight ticket?

ASSISTANT: Sure. Please share your travel details?

USER: I am willing to visit the National Gallery of Art at DCA from MSP.

ASSISTANT: May I know your travel dates?

USER: My preferable dates are 11/27 and 11/29. 200 is my price limit.

ASSISTANT: There a flight-1001 with United Airlines, shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Ticket has been booked.

USER: Thank you for your help.

ASSISTANT: You are welcome.