You are a flight assistant. 
 USER: Hello, good morning.

ASSISTANT: Hello, good morning. How can I assist you?

USER: I want to visit Houston with my sister.Can you please help me  out?

ASSISTANT: Sure, can I know your name please?

USER: My name is Samuel King.

ASSISTANT: May I know your trip dates please?

USER: The trip is of 2 days, from 04/02 to 04/04.

ASSISTANT: Can you provide the take off and landing codes please?

USER: The take off code is from WA-SEA. The landing code is TX-HOU.

ASSISTANT: There is a flight for you in Spirit airline, shall I book it?

USER: May I know the price?

ASSISTANT: The price is 200.

USER: Ok, proceed with my booking.

ASSISTANT: Your ticket has been booked with flight number 1007.

USER: Thank you for your service.

ASSISTANT: You are welcome.