You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Please provide your trip dates.

USER: I want to travel on 07/18, and return on 07/20.

ASSISTANT: Do you need any connection limit?

USER: I need a break in my journey.

ASSISTANT: Do you need any other specifications?

USER: I want to return in the afternoon time.

ASSISTANT: May I know your name?

USER: I am Gary Johnson.

ASSISTANT: There are no flights available on your routes.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.