You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket from PHL to DCA.

ASSISTANT: Sure, please share your planned travel dates?

USER: My trip is in June from 21st to 23rd.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct  flight.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: No, thanks for asking.

ASSISTANT: Can I have your name please?

USER: Sandra White.

ASSISTANT: Sorry, no flights found with your given details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.