You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How may I help you?

USER: I want to book a flight ticket from PA - PHL, to attend my brother's birthday in NY - LGA. Can you book a flight ticket for me?

ASSISTANT: Sure. May I know your travelling dates?

USER: The price limit should be 500. I will start on 10/15 and return on 10/17.

ASSISTANT: Flight can be booked with airline frontier, flight number 1011. Flight connections 1 having price 100.

USER: Ok, confirm my booking.

ASSISTANT: Please provide your name?

USER: I am Helen Gonzalez.

ASSISTANT: Flight ticket is booked.

USER: Thanks for your assistance.

ASSISTANT: Thanks.