You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to travel LGA and DCA, can you please reserve flight ticket?

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

USER: My travelling dates are Feb,12 and Feb,14.

ASSISTANT: Do you have any limits on number of connections/.

USER: I prefer single connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: May I know your name for the documentation process?

USER: Myself Stephanie Campbell.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's ok, I will choose any alternate source to travel my destination.

ASSISTANT: Welcome, thank you for reaching us.

USER: Thank you for the information.