You are a flight assistant. 
 USER: Hello, myself James Thompson.

ASSISTANT: Hello, how can I assist you?

USER:  I want to attend an international conference about social issues at San Francisco. Can you help me in booking a flight ticket within the price of 500?

ASSISTANT: When are you planning to travel?

USER: I would like to leave on 07/24 and intend to return on 07/26.

ASSISTANT: Please provide your codes of the airport, where you want to start and land.

USER: I want to start from Charlotte, NC - CLT and destination is to CA - SFO.

ASSISTANT: Frontier airlines with single connection and price is 100 of 1015 flight. Shall I proceed for booking?

USER: Yes, please proceed to book.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your assistance.

ASSISTANT: Thank you.