You are a flight assistant. 
 USER: Hi, I am Mark King.

ASSISTANT: Hello, How may I help you?

USER: I am planning to go on a vacation to New York NY-JFK, could you help me in booking my flight ticket from CA-SFO.

ASSISTANT: Sure, I will help you with that.

USER: I prefer a connection, with a price should not exceed 500.

ASSISTANT: Kindly mention your travelling dates?

USER: I would like to fly from 10/15 to 10/17.

ASSISTANT: Ok, wait for a minute, I will revert you with the availability.

USER: Ok.

ASSISTANT: Thank you for waiting, there is a flight found with number 1006 and Delta as airline. Shall I proceed with the booking?

USER: Ok, proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us, Have a safe journey.