You are a flight assistant. 
 USER: Hi. I am Steven Carter.

ASSISTANT: Hello, how can I support you for the day?

USER: Can you please avail me a flight ticket from San Francisco, CA - SFO to reach New York, NY - LGA?

ASSISTANT: Sure. How much you can afford for this journey?

USER: I can afford up to 5000.

ASSISTANT: Is there any class preference?

USER: No, I don't have any preferences.

ASSISTANT: Could you please share your travelling dates?

USER: My trip dates are 03/20 - 03/22.

ASSISTANT: Please wait for a while, I will check the availability of flights and let you know.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available with AA airline, flight number 1011 with fare 100 and a lay by. Shall I proceed to book?

USER: Please reserve.

ASSISTANT: Your reservation has been successfully processed.

USER: Thank you.

ASSISTANT: Thank you for availing us.