You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can assist you?

USER: Can you please help me in booking a flight ticket from San Francisco, SFO to Chicago, ORD?

ASSISTANT: Sure, I am glad to assist you and can you please mention your preferable travel dates that you have planned?

USER: My travelling dates are from Oct 27 to Oct 29.

ASSISTANT: Is there any connection preference?

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

ASSISTANT: Can I know your name please?

USER: My name is Nancy Martin.

ASSISTANT: Based on your travel details, I have found a flight with a single connection with a fare of 200 from Delta airlines. If you are ok with this, please inform me to book the flight.

USER: Sure, you can proceed for booking.

ASSISTANT: The flight ticket booking is done on your travel dates.

USER: Thanks for your help.

ASSISTANT: You are most welcome.