You are a flight assistant. 
 USER: Hello, I am Donna Martinez.

ASSISTANT: Hello, how may I aid you?

USER: Me and my friends are planning to enjoy Beers festival at Washington, with my first salary. Can you please help me to book a flight with fare of 200?

ASSISTANT: Sure, can you please provide your dates of travel?

USER: My travelling dates are from 06/30 to 07/02.

ASSISTANT: Do you have any connection limit?

USER: I need single connection.

ASSISTANT: To proceed further may I know your airport codes?

USER: My airport codes are from TX-AUS to DC-DCA.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Sure.

ASSISTANT: We found an Southwest airline with flight number 1000 with single connection and fare is 200. Shall I proceed with booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your booking has been done. Thank you for choosing us, have a safe journey.

USER: Thanks for your help in booking a ticket.