You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am George Perez, help me in booking a flight to MSP. I want to travel on 12/08.

ASSISTANT: George, may I know your nearest airport code?

USER: I want to travel from PHL.

ASSISTANT: Do you want a return ticket also?

USER: Yes. My return date will be on 12/10. 500 is my price limit.

ASSISTANT: Please allow me a moment to check the availability of tickets.

USER: Sure.

ASSISTANT: George, sorry to inform you that there is no flight available on your requested dates.

USER: Oh! ok. Thank you for your help.

ASSISTANT:  Would you like to fly on any other dates?

USER: No.

ASSISTANT: You are welcome. Thank you for reaching us.