You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Can you help me with booking ticket from DCA to JFK?

ASSISTANT: Can you please share your preferable journey dates?

USER: Sure, my trip dates are from Feb 26 to 28.

ASSISTANT: May I know your name please?

USER: Rebecca Thompson here.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any specifications?

USER: Ok, I would like to depart in the evening and return in the afternoon.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.