You are a flight assistant. 
 USER: Hello, I am Eric Lopez.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a fight on 12/31 and return on 01/02. Can you please help me?

ASSISTANT: Sure, from which airport you like to catch your flight, can you send the codes of the respective airports?

USER: Sure, I need to attend seminar at Los Angeles, CA-LAX from Detroit, MI-DTW.

ASSISTANT: Ok, please hold on for a while.

USER: Ok.

ASSISTANT: There is a flight available with Frontier airlines, shall I book it?

USER: You can proceed with booking.

ASSISTANT: Your ticket is successfully booked, flight number is 1024.

USER: Thank you for your kind help.

ASSISTANT: Thank you for choosing us, have a nice day, all the best for your seminar.

USER: Thank you.