You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am John Anderson. I am going to participate in Outdoor Trivia race in Dallas on 02/23, can you book me a ticket?

ASSISTANT: Sure. May I know when would you like to return?

USER: Sure, I will return on 02/25.

ASSISTANT: Do you need a stopover in between your route?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: Please let me know your airport codes.

USER: Sure, I am flying from CA-SFO to TX-DFW.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Sure.

ASSISTANT: Ok, there is an Delta airline with flight number 1004 is available for you at this moment and the amount to be paid is 500. Shall I proceed?

USER: Please make it confirm.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.