You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me in booking a flight ticket from DFW to ORD?

ASSISTANT: Sure, may I know your planned trip dates?

USER: Sure, I would like to go on Aug 08th and return back on Aug 10th.

ASSISTANT: Do you have any connection limit?

USER: Ensure it is a single connecting flight.

ASSISTANT: Is there any class preference?

USER: Ensure it is in the business class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: Myself Melissa Thompson.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.

USER: Welcome.