You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: Can you aid me in booking a flight ticket from PHL to DCA?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on Mar 21st and return  back on Mar 23rd.

ASSISTANT: Ok, do you have any specifications?

USER: Make sure that connection limit is 1.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Take your time.

ASSISTANT: May I know your name please?

USER: I am Christine Martinez.

ASSISTANT: Sorry Christine Martinez, there are no flights available on your requested dates.

USER: No issues. Thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.