You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Campbell.

ASSISTANT: In which way I can help you at this moment?

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

ASSISTANT: Sure, I am happy to help you with that. Can you please mention your preferable travel dates?

USER: I want to travel on 12/21, and return on 12/23.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I want to return in the afternoon time.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I need a connecting flight.

ASSISTANT: Is there any additional preferences do you have?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

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

ASSISTANT: Thank you for contacting us.