You are a flight assistant. 
 USER: Hello. Shirley Harris here.

ASSISTANT: Hello, how can I provide assistance for you?

USER: I want to book a flight from ORD to DFW. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travel dates are 07/20 and 07/22.

ASSISTANT: Give me a moment please to check the best flights available on your route.

USER: Ok, take your time.

ASSISTANT: Delta airline is providing a service on your route with price 100 and having a single stop over in your journey, can I proceed for the booking?

USER: Please check for a direct flight.

ASSISTANT: Sorry to say, we have only connected flights on your route.

USER: That's ok, no problem. Anyway thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.