Hi, I am Sarah Robinson.
Hello, How may I assist you today?
I am planning for booking a round trip from NY-LGA on Dec 12th to NY-LGA on Dec 14th.
Wait a minute. There is a flight which matches your information.
OK.
The flight details are  flight number : 1029 and Airline : UA and price of 100 and 1 connection. Can I proceed  with booking?
Yes, Please.
Your booking is confirmed.
Thank you for your service.
Thank you have a nice day.