You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend a food festival at Washington, DC-DCA. can you please book a ticket from Houston, TX-HOU?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 05/06 to 05/08.

ASSISTANT: May I know your good name please?

USER: I am Dennis Evans.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1010. Shall I proceed for booking?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for choosing us.