You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jonathan Green. I am planning journey from Boston, MA - BOS to PA - PHL for sisters marriage. Can you help me in booking a ticket?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My travel dates are from 09/03 to 09/05.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a good day.