You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jessica Mitchell. I want to book a flight ticket within 200. Can you help me?

ASSISTANT: Sure, we will help that.

USER: Thank you.

ASSISTANT: Which airports do you prefer to start and land on?

USER: LGA and DCA are my airport codes.

ASSISTANT: When do you want to catch your depart flight and return flight?

USER: 21st May and 23rd May are my travelling dates.

ASSISTANT: How much can you spend in booking?

USER: I have already mentioned above.

ASSISTANT: Do you prefer a connecting flight either a direct flight?

USER: I need a connecting flight.

ASSISTANT: Which class do you want to travel a business class or a economy?

USER: I am comfortable with any class.

ASSISTANT: Thank you for sharing your valuable information. We found a economy flight 1017 in UA airline the price is 100 with a halt. Shall I proceed with a fare of 100?

USER: You can proceed it for booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.