You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Gary Perez.

ASSISTANT: How may I help you?

USER: I want to travel from PA-PHL to MA-BOS for attending a seminar.Can you please help me for booking a ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: My departure date is 11/04 and return date is 11/06.

ASSISTANT: Ok, please wait a moment.

USER: Make sure my price limit is 500 and the connections limit is 0.

ASSISTANT: Sorry, there is no flight with 0 connection.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.