You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am looking for a flight from HOU to DEN, can you please help me in booking?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travel dates?

USER: My travelling dates are June 23 and June 25.

ASSISTANT: May I know your name?

USER: Sure, my name is Stephen Perez.

ASSISTANT: Do you have any preferences?

USER: I prefer economy class flight.

ASSISTANT: Single connection flight is available in Southwest airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: Please proceed.

ASSISTANT: Your ticket is booked in economy class with the flight-1015.

USER: Thank you for booking.

ASSISTANT: You are welcome.