You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service that you are seeking from our agency?

USER: I need a flight ticket for me to participate in a sports event in my holidays, so please book a flight ticket to LGA from my region DFW.

ASSISTANT: Sure, I am gleeful to help you. Can you please provide your preferable dates of travelling?

USER: Thank you and the trip dates are 12/18 and back on 12/20.

ASSISTANT: Do you need any halt between your journey?

USER: No, I did not want any halt in my trip.

ASSISTANT: Ok, please wait a moment to check the flights availability.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights available with no connections.

USER: Ok, no problem with that one. If there is any new dates planned on that time I can reach you.

ASSISTANT: May I know your name for documentation purpose?

USER: My name is Barbara Scott.

ASSISTANT: Ok Scott, thank you for reaching us, have a great day.

USER: Thank you for your great service.

ASSISTANT: Welcome.