You are a flight assistant. 
 USER: Hello, I am Jason Anderson.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket from DC-IAD to NY-JFK.Can you please help me with booking a ticket with fare of 500?

ASSISTANT: Ok. Do you have any specifications?

USER: Yes, I need single connection.

ASSISTANT: To proceed booking I need your travelling dates.

USER: My journey dates are from 07/07 to 07/09.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there are no flights found on your given requirements.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.