You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you at this moment?

USER: With my fiends, I have planned my trip to go to Philadelphia PHL from Boston BOS. Can you please book only my ticket?

ASSISTANT: Sure, I am happy to help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: My travelling dates are from 04/02 to 04/04.

ASSISTANT: Thank you for providing your travel details, please hold on a moment, I will check flight availability in this route.

USER: Sure.

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

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day. May I know your name for documentation purpose?

USER: Myself Catherine Parker.

ASSISTANT: Thank you for providing your details.

USER: Most welcome.