You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you the best today?

USER: I am Cynthia Walker.

ASSISTANT: OK.

USER: I would like to attend a seminar on social issues, Can you please book a flight ticket from DEN to BOS?

ASSISTANT: Sure. Kindly ensure your planned travel dates?

USER: My planned travel dates are, depart on 11/10 and arrival on 11/12.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a nice day.