You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to book a flight ticket to ORD from LGA, can you please help me out?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned travelling dates are June 26 and June 28.

ASSISTANT: Thank you, do you have any class preferences?

USER: Yes, I prefer economy class.

ASSISTANT: Sure, may I know your name for the documentation purpose?

USER: Sure, my name is Karen Perez.

ASSISTANT: Do you have any another preferences on your trip?

USER: My depart time must be in afternoon.

ASSISTANT: American  Airlines providing a flight with the price 200 with single connection. Can I proceed for the booking.

USER: Ok, please proceed.

ASSISTANT: Your flight ticket reservation done with the flight number 1016.

USER: Thank you for the help.

ASSISTANT: Welcome, thank you for opting us.