You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Christine Green here. I want to travel from JFK to BOS for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: May I know your travelling dates please?

USER: My departure date is 06/17 and return date is 06/19. Please give me a moment.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.