You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Kimberly Roberts planning to visit San Francisco, can you book a ticket with price under 200?

ASSISTANT: Yes, please share your travel dates.

USER: Sure, my travelling dates will be 08/31 and 09/02.

ASSISTANT: Can I know your airport codes?

USER: Yes, I want to fly from JFK to SFO.

ASSISTANT: The flight 1007 of UA airlines is available on your requested dates with a price of 100. Shall I proceed?

USER: Ok, proceed with my booking.

ASSISTANT: Roberts, your ticket is booked successfully.

USER: Thank you.

ASSISTANT: You are welcome.