You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in reserving a flight ticket to PHL from BOS?

ASSISTANT: Sure, let me know your travel dates please?

USER: My travel dates are from Mar 10 to Mar 12.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: I am Donna Nelson.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.