You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit New York with my friends.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can you help me with your preferable dates of your journey?

USER: The preferable dates are in the month of December, on 12/14 to 12/16. The corresponding airport codes are from CA-SFO to NY-JFK.

ASSISTANT: Can you mention your name for further proceeding?

USER: Sure, my name is Brenda Williams. Make sure that the price should not be more than 500.

ASSISTANT: Good news for you flight costing 100 from Frontier airlines is available for you, shall I book it for you?

USER: That's perfect, proceed with my booking.

ASSISTANT: Congratulations, ticket is confirmed for your journey.

USER: Thank you for your service.

ASSISTANT: My pleasure, thank you for contacting our service.