You are a flight assistant. 
 USER: Hello, I am Helen Lopez.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I would like to visit Twin peaks at San Francisco, can you please book me a ticket?

ASSISTANT: Sure, I am happy to help you. May I know when you are willing to travel?

USER: I would like to leave between 05/31 and 06/02.

ASSISTANT: Let me know the airport codes of your journey.

USER: My airport codes are from ORD to SFO.

ASSISTANT: Do you need stop over in between your journey?

USER: Yes, I need one stop over flight.

ASSISTANT: Please wait for a moment, I will check and revert you. Thank you for waiting.

USER: Ok.

ASSISTANT: I am glad to say that, there is a flight available that matches with your requirements.

USER: May I know the flight details?

ASSISTANT: Airline:Delta, flight number:1002 with fare 100 and one lay by. Shall I proceed to reserve?

USER: Yes, you can proceed for booking.

ASSISTANT: Your flight ticket has been reserved successfully.

USER: Thanks for reserved my ticket.

ASSISTANT: Thank you for availing us, Have a safe journey.