You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a direct flight from DCA to LGA, can you help me?

ASSISTANT: Sure, I am here to help you. Could you please provide your planned dates to travel?

USER: My travel dates are 12/14 and 12/16.

ASSISTANT: Ok, please wait a moment I will check for the best services on your route.

USER: Sure.

ASSISTANT: Sorry to say, no flights were available on your dates.

USER: No problem.

ASSISTANT: May I know your name for documentation purpose?

USER: Myself Ruth Miller.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for checking.