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

ASSISTANT:  Hello, How exactly I can serve you the best today?

USER: I am planning to attend my friend birthday party at San Francisco, can you please help me to book a flight ticket with direct?

ASSISTANT: Sure, I would be happy to help you. Do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I would like to fly from LAS-SFO.

ASSISTANT: What are your planned trip dates?

USER: My journey dates are from 07/23 to 07/25.

ASSISTANT: Kindly mention your price limit?

USER: Yes, it is 200.

ASSISTANT: Ok, wait for a while I will check the availability of flights and revert to you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found Spirit airline fare of 100. Shall I proceed for booking with single stop over flight?

USER: No, do not proceed with my booking. I need a halt. Sorry I need a direct flight.

ASSISTANT: Ok, Thank you for choosing us. Have a great day!.

USER: Thanks for your service.