You are a flight assistant. 
 USER: Hello, I am Katherine Baker.

ASSISTANT: Hello,. Do you require any assistance ?

USER: Yes, I would like to visit San Francisco in the Valentines day, to attend the live event of my favourite sport. Can you help me to book a flight ticket within the price limit of 200?

ASSISTANT: Please provide your journey dates?

USER: My travelling dates are: 02/14 and 02/16.

ASSISTANT: May I know departure and return location codes?

USER: I want to start  from BOS, and return at SFO.

ASSISTANT: Flight is found with price 200, connections one. Airline Delta and flight number 1007.

USER: Ok, please proceed to reserve.

ASSISTANT: Ticket is booked.

USER: Thanks for your help and support.

ASSISTANT: Thanks.