You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Carolyn Campbell. I am planning to book a ticket from PHL to BOS. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I am planning to travel on July 22 and return back on July 24.

ASSISTANT: May I know your departure time and arrival time?

USER: Yes, my depart time is afternoon.

ASSISTANT: Do you have any other requirements?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: You have no flights to travel on your particular days of journey.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you.