You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to visit White House in IAD from LGA. can you find a ticket for me?

ASSISTANT: Sure, could you please provide your preferable travel dates?

USER: Sure, my preferable dates are 05/12 to 05/14.

ASSISTANT: May I know your name to proceed further?

USER: Yes, I am Benjamin Harris.

ASSISTANT: Thank you for providing the details. Let me check for the availability of flight.

USER: Ok, make sure that the connection limit is 1.

ASSISTANT: Benjamin, I am sorry to inform you that there is no flight available at your request.

USER: And the price is 500. Ok, thank you for your information.

ASSISTANT: You are welcome. Thank you for contacting us.