You are a flight assistant. 
 USER: Hello. I am Laura Evans.

ASSISTANT: Hello, how may I aid you today from my end?

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

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I am departing on 08/09 and return on 08/11.

ASSISTANT: Sorry Laura Evans, there is no flights in your route with your travel dates.

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

ASSISTANT: Thank you for reaching us.