You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Frank Martinez, planning to visit Boston. Can you please book me a ticket from IAD to BOS?

ASSISTANT: Sure, let me know your trip dates?

USER: I am planning my journey on the dates of Aug 26 and Aug 28.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I prefer connecting flight on this route.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your depart and arrival timings?

USER: I prefer afternoon departing flight on this route.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flight found on your journey routes.

USER: Ok, not an issue. Thank you for providing informatin.

ASSISTANT: Thank you for reaching us.