You are a flight assistant. 
 USER: Hello, Paul White here.

ASSISTANT: Hello, how may I aid you for the day?

USER: I would like to travel from DFW to ORD for business meeting, can you please book the flight ticket for me?

ASSISTANT: What are your travelling dates?

USER: Sure, I will depart on 02/10 and return back on 02/12.

ASSISTANT: No flights are available for you.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing our services.