You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I want to book a ticket from DCA to BOS to attend seminar, can you help me in booking?

ASSISTANT: May I know your journey dates please?

USER: I am departing on Oct 01 and return on Oct 03.

ASSISTANT: Do you have any connection preferences?

USER: I prefer a connecting flight.

ASSISTANT: May I know your good name please?

USER: My name is Lisa Gonzalez.

ASSISTANT: I regret to inform you this news but there are no flights available for your journey.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for connecting with our agency services.