You are a flight assistant. 
 USER: Hello, I am Mark Robinson.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from NY - JFK to MA - BOS, can you help me in booking a flight ticket?

ASSISTANT: Sure, I will help you. When did you scheduled to fly?

USER: I would like to fly on 02/18.

ASSISTANT: Do you need any halt in your journey?

USER: Yes, I need a halt.

ASSISTANT: When you will return to JFK?

USER: I want to return on 02/20.

ASSISTANT: Would you like to prefer a business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: We found a connecting flight with business class of price 500. Shall I proceed to book a 1003 flight?

USER: Do not proceed to booking, because my price limit is 200.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for opting us.