You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Could you help me in booking a flight ticket from IAD to JFK?

ASSISTANT: Your travelling dates pleas?

USER: My departure day is Mar 07, return day is Mar 09.

ASSISTANT: Do you have any specifications?

USER: I want a economy class flight ticket. And I want a flight with one connection.

ASSISTANT: May I know your name please?

USER: My name is Emma Moore.

ASSISTANT: I am sorry no flights found on your route.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.