You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How shall I help you?

USER: I am Donna Young want to attend a nano science exhibition. So, can you book flight from Dallas,DFW to Los Angeles, LAX?

ASSISTANT: Ok. Please specify your travel dates?

USER: The events starts on 12/26 and ends on 12/27.So, I will go on 12/25. I will return on end of the day of that event.

ASSISTANT: Please provide flight connections limit?

USER: I need a break in between my journey.

ASSISTANT: No flight found for your requirement as there is direct flight.

USER: Ok. Thanks for the information.

ASSISTANT: Thanks.