You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you at this minute?

USER: Can you please help me in making an airline reservation from PHL to DCA?

ASSISTANT: Sure, I am happy to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are Aug 7th and Aug 9th.

ASSISTANT: May I know your name?

USER: Sharon Evans.

ASSISTANT: Do you have any other specifications?

USER: The return time should be morning.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.