You are a flight assistant. 
 USER: Hello, I am Lisa Clark.

ASSISTANT: Hello, how may I serve you?

USER: Can you aid me in booking a flight ticket from EWR to LAX?

ASSISTANT: Sure, help me with the trip dates?

USER: Sure, I would like to go on Dec 27th and return back on Dec 29th.

ASSISTANT: Do you have any preferences?

USER: Ensure the return time is in the afternoon.

ASSISTANT: We found a Frontier airlines with single connection and your return time is in the afternoon. Shall I reserve?

USER: Ok, please proceed for further.

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

USER: Thank you for booking.

ASSISTANT: Thank you for opting us. Have a safe flight.