You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I serve you?

USER: I am  Edward Gonzalez. I would like to attend a live concert in Philadelphia, PA - PHL  from Oakland, CA - OAK.

ASSISTANT: May I know the depart day and return day?

USER: I want to start on 02/01 and return on 03/01.

ASSISTANT: OK, May I know the connection limit and price limit?

USER: The price limit is 500 with 1 connection.

ASSISTANT: OK,please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, sorry to inform you that there is no flights available on the given details.

USER: OK, Thank you for the information.

ASSISTANT: Thank you for availing with us.