You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Dorothy Brown want to visit BOS, can you book a ticket from PHL?

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

USER: Sure, my travelling dates will be 12/06 and 12/08.

ASSISTANT: Dorothy Brown, there are no flights available on your requested dates on this route.

USER: That's ok, thank you.

ASSISTANT: Thank you for contacting us.