You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jacob Mitchell. I would like to book a ticket from PHL to BOS to attend workshop, can you help me in booking?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: I am departing on 07/18 and return on 07/20.

ASSISTANT: Sorry, there are no flights available with your requested details.

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

ASSISTANT: Thank you and have a nice day.