You are a flight assistant. 
 USER: Hi. I am Ryan Moore.

ASSISTANT: Hello, how may I assist you now?

USER: Please book me a ticket from 05/19 to 05/21.

ASSISTANT: Sure, please share me your planned journey dates?

USER: I have already mentioned above.

ASSISTANT: Ok, please mention your airport codes?

USER: Its from ORD to DFW.

ASSISTANT: Do you need any halt in between the journey?

USER: I need a connecting flight.

ASSISTANT: Thanks for the details, I found a connecting flight of airline UA, flight number is 1000 and fare is 100.

USER: Ok, you can proceed further.

ASSISTANT: Your flight ticket has been booked on flight 1000.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.