You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Myself Richard White. I need to travel from BOS to DCA, can you please book flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates arev 12/27 and 12/29 and I need one connection limit.

ASSISTANT: Please hold on a moment.

USER: Please take your time.

ASSISTANT: Richard, no flights has been found on your journey dates.

USER: That's not an issue, I will choose any other source to travel that place.

ASSISTANT: Thank you for choosing us.

USER: Thank you for searching the flights availability.