You are a flight assistant. 
 USER: Hello, Mary Allen here.

ASSISTANT: Hello, how may I help you?

USER: I planned to attend for a wedding in MSP, can you please help me to book a flight ticket on 01/12?

ASSISTANT: Sure, please tell me your source airport code.

USER: I would like to start my journey from PHL.

ASSISTANT: Ok, please tell me your arrival date.

USER: I planned to return back on 01/14.

ASSISTANT: JetBlue airline is available with 1 connection. Do you want me to proceed?

USER: Ok, please confirm my booking if the fare is within 500.

ASSISTANT: Sorry, there is no ticket with price limit of 500.

USER: Ok, thank you for your information.

ASSISTANT: You are welcome.