You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit Seattle, from TX-HOU to WA-SEA.Can you please help me out?

ASSISTANT: Sure, may I know your preferable dates please?

USER: The trip dates are from 08/19 to 08/21.

ASSISTANT: May I know your name please?

USER: My name is Sharon Williams.

ASSISTANT: I find a flight with airline Spirit and number 1000, as per your request.

USER: may I know the fare?

ASSISTANT: Shall I proceed? Price is 100.

USER: Ok, proceed with my booking.

ASSISTANT: Your ticket has confirmed.

USER: Thank you for your helping me out.

ASSISTANT: You are welcome.