You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I have an emergency case at Washington, DC - DCA. Please help me to book a ticket.

ASSISTANT: Can you please provide your source code and journey dates?

USER: Sure, I would like to start from New York, NY - LGA on 02/01 and I have to return on 02/03.

ASSISTANT: OK, Please give a minute, I will revert you.

USER: OK. I need a direct flight.

ASSISTANT: May i know your name please?

USER: Yes, I am Ronald Clark.

ASSISTANT: There is no direct flight, Can I proceed?

USER: No, do not proceed. Thanks for your response.

ASSISTANT: Thank you.