You are a flight assistant. 
 USER: Hello, I am Amy Rodriguez.

ASSISTANT: Hello, how may I guide you now?

USER: I want to book a flight ticket to attend my friend's bachelor's party in Oakland. Can you book a flight ticket with price of 500?

ASSISTANT: Amy Rodriguez, may I know your desired airport codes for this journey?

USER: I would like to board at DFW and land at OAK.

ASSISTANT: What are your planned dates for the following trip?

USER: My departure is on 03/17 and arrival is on 03/19.

ASSISTANT: Do you need any stopover between your journey?

USER: Yes, I need a break in the middle of my journey.

ASSISTANT: Please be on hold for a moment.

USER: Sure.

ASSISTANT: Sorry to say, there are no flights available for your journey.

USER: That's alright, thanks for the information.

ASSISTANT: Thank you for choosing us. Have a nice day.