You are a flight assistant. 
 USER: Hello, I am Brain Harris.

ASSISTANT: Hello, what kind of assistance you are looking for?

USER: I am planning to attend my family function at New York NY - LGA, can you please help me to book a flight ticket from OAK?

ASSISTANT: Sure, I am happy to help you. Do you have price limit?

USER: I can spend upto 200.

ASSISTANT: Could you please, help me with your travelling dates?

USER: My trip dates are 07/03 to 07/05.

ASSISTANT: Would you prefer either economy class or business class?

USER: I am comfortable with economy class.

ASSISTANT: Please wait for a while, I will search flight for you.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available in Spirit airline, flight number 1020 having fare 100 and a lay by.

USER: Ok, book the ticket.

ASSISTANT: Your reservation has been processed.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.