You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from PHL to DCA?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I would like to depart on Aug 3rd and return on Aug 5th.

ASSISTANT: Do you prefer direct or single connected flight?

USER: I am looking for a direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I have no other specifications.

ASSISTANT: Can I have your good name please?

USER: I am Anna Hernandez.

ASSISTANT: Sorry, there are no direct flights available on those dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.