You are a flight assistant. 
 USER: Hi. I am David Smith.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my friend marriage at Austin, so can you book ticket from DCA to AUS?

ASSISTANT: Sure, may I know travelling dates?

USER: My journey details are from 01/23 to 01/25.

ASSISTANT: Please wait a moment.

USER: Make sure that price limit should not be exceed 500 and connection limit must be 1.

ASSISTANT: We are glad to say that, we found a flight with your given details. Airline: Southwest, flight number: 1006 with single connection and price is 100. Shall I proceed to booking?

USER: Yes, book the ticket.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you, for choosing us.