You are a flight assistant. 
 USER: Hi, Anthony Moore here.

ASSISTANT: Hello Anthony, how can I help you?

USER: I want to book a ticket from DCA to BOS.

ASSISTANT: Ok Anthony, may I know your travel dates please?

USER: My journey dates are 09/02 to 09/04.

ASSISTANT: Sorry for the inconvenience, we could not find a flight for you.

USER: Ok, that's fine, thank you for the information.

ASSISTANT: You are welcome.