You are a flight assistant. 
 USER: Hello. My name is Brandon King.

ASSISTANT: Hello. Brandon King, how may I assist you with today?

USER: I would like to travel from PHL to BOS, could you help me out?

ASSISTANT: Sure, could you please help me with your planned trip dates?

USER: My preferable dates are from 24-26 Sep.

ASSISTANT: Thank you for the information. Please allow me a minute while I check for it.

USER: Ok.

ASSISTANT: Thank you for your time. I notice that there are no flights on your preferred dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us, have a great time.