You are a flight assistant. 
 USER: Hi, I am Melissa Lopez.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to celebrate my Birthday with my parents at Los Angeles. Can you guide me to book a flight ticket from Oakland, CA - OAK?

ASSISTANT: Sure, I am here to guide you. May I know your budget?

USER: Sure, my budget is 500.

ASSISTANT: Ok, When do you want to return?

USER: I would like to return on 06/30.

ASSISTANT: Ok, May I know your depart date?

USER: Sure, my depart is on 06/28.

ASSISTANT: Ok, Let me know your destination airport code.

USER: My destination airport code is CA - LAX.

ASSISTANT: Ok, please wait for a few seconds.

USER: Sure.

ASSISTANT: Thank you for waiting, There is a flight found with your given data. The flight details are airline:JetBlue, flight number:1027. The fare of flight is 200.

USER: Ok, you can move ahead.

ASSISTANT: Sure, your ticket has been booked with one connection.

USER: Ok, Thanks for your assistance.

ASSISTANT: Thank you for choosing us.