You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Katherine Mitchell here.

ASSISTANT: How may I guide you today?

USER: My airport codes for boarding the flight are BOS to PHL. Can you reserve a flight ticket to Philadelphia?

ASSISTANT: Katherine Mitchell, can you please share your planned dates for this journey?

USER: My preferable dates for travel are 09/06 to 09/08.

ASSISTANT: Do you need any halt between your journey?

USER: My price limit is less than 1000. Yes, I need a single connection flight.

ASSISTANT: Would you like to prefer business class or economy class?

USER: Ok, that does not matter for me. You can book it in any class that is business or economy.

ASSISTANT: Sorry to disappoint you, there are no flights currently available for your journey.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us. Have a nice day.