You are a flight assistant. 
 USER: Hi, I am Justin Turner.

ASSISTANT: Hello, how may I be helping hand to you?

USER: I want to attend a seminar at New York on 04/11 and I want to return on 04/13, can you help me in booking flight ticket?

ASSISTANT: Sure, can you please provide your airport codes?

USER: Yes, I would like to travel from DC-IAD to NY-JFK.

ASSISTANT: Do you have a price limit?

USER: Yes, my price should be under 200.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, the price for flight we have is 300.

USER: Ok, please don't proceed with this booking.

ASSISTANT: Ok.

USER: Thank you for the response.

ASSISTANT: Thank you for choosing us.