You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Perez.

ASSISTANT: Mary Perez, how may I assist you today?

USER: I need to attend business meeting with my clients at Atlanta, can you please help me to book a flight ticket from BOS to ATL?

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: Sure, my journey dates are Feb 20 and Feb 22.

ASSISTANT: Mary Perez, do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please let me know with your preferred depart and return time.

USER: My departing time is afternoon.

ASSISTANT: Thank you. Please let me know if you have any other preferences in your journey.

USER: No, I don't have any preferences.

ASSISTANT: Please allow me a minute to check for the available flights.

USER: Sure, take your own time.

ASSISTANT: Mary Perez, I am really sorry to inform you that there are no active flights available.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great day.