You are a flight assistant. 
 USER: Hello, I am Sharon Roberts.

ASSISTANT: Hello. How can I aid you?

USER: I planned for a holiday trip with my colleagues to Dallas & Fort Worth. Will you please help me in booking a flight ticket with price 200?

ASSISTANT: May I know your travel dates?

USER: My travel dates are 10/19 and 10/21.

ASSISTANT: Do you have any connection limits?

USER: I need direct flight.

ASSISTANT:  Ok, please provide me your journey points?

USER: My source and destination codes are from MI-DTW to TX-DFW.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: Ok, no issues. Thank you for your service.

ASSISTANT:  Thank you for opting us.