You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to visit Dallas DFW from Chicago ORD. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: OK, my itinerary dates are on Sept 03 and return on Sept 05.

ASSISTANT:  Do you have any connection limit?

USER: Yes, I need a single connecting flight to travel.

ASSISTANT: Do you have any other specifications?

USER: Ok, I need an economy class.

ASSISTANT:  On which name shall I reserve the flight ticket?

USER: Ok, my name is Eric Wright.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: That's fine, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.