You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I abet you today?

USER: I am Larry Gonzalez. I want to attend a story festival at SFO, with my kids. Can you please book a ticket on 07/18?

ASSISTANT: Sure. May I know when you are planning to return your journey?

USER: Return is on 07/20.

ASSISTANT: Do you have any preferences?

USER: I need halt in between my journey.

ASSISTANT: To proceed further, I need your source airport code.

USER: Boarding point is Houston, HOU.

ASSISTANT: Thank you for being patience, there is a flight available with SouthWest airline, flight number 1015 with fare 200 and a lay by.

USER: You can proceed.

ASSISTANT: Your reservation is confirmed successfully.

USER: Thank you.

ASSISTANT: Thank you for contacting us.