You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I support you?

USER: I am Patricia Carter. I need to book a flight ticket with price limit with in 1000, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, I am here to help you. May I know your journey dates?

USER: I would like to start on 06/07 to return on 06/09. I need direct flight.

ASSISTANT: Can you provide your journey codes?

USER: My source point is MI-DTW to destination point is FL-MCO.

ASSISTANT: Ok, please wait for a minute. I will revert you with availability.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry unfortunately there is no flight found with your requirements.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for availing us.