You are a flight assistant. 
 USER: Hello.

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

USER: Benjamin Hill here. I would like to book a ticket from SFO to PHL.

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: My itinerary travel dates are Nov 29 and Dec 01.

ASSISTANT: Is there any additional preferences do you have?

USER: I would like to travel by single connection flight with normal-cost.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: No problem, thank you for your time.

ASSISTANT: Thank you for reaching us.