You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are expecting from our side?

USER: Melissa Taylor here. Could you book my ticket in a connecting flight?

ASSISTANT: Sure, can you please forward your journey dates?

USER: My itinerary dates are Jan 25 and Jan 27.

ASSISTANT: Kindly assign your boarding and landing airport codes?

USER: I want to meet my Facebook friend, so please book my ticket from DFW to AUS.

ASSISTANT: Is there any airline preference in your journey?

USER: I had a bad experience in low-cost airlines, so I want to travel in normal-cost airlines.

ASSISTANT: Ok, please let me know if any other requirements need.

USER: I don't have any preferences.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: We found a connecting flight with United airlines matching your specifications, price is 200 in economy class. Shall I proceed?

USER: Please book my ticket.

ASSISTANT: Your ticket has been reserved with 1000 flight number.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.