You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Lisa Johnson. I would like to celebrate the beer festival in golden west beer tour which is in Oakland. Can you please help me in booking?

ASSISTANT: Sure, can you please share your price limit?

USER: I can spend up to 5000.

ASSISTANT: Ok, may I know when you want to travel?

USER: I would like to travel on 07/19 and return on 07/21.

ASSISTANT: Can I have your source and destination?

USER: My source code is NY-LGA and destination code is CA-OAK.

ASSISTANT: Do you have any other restrictions to be met?

USER: I need a flight with single connection. I can spend up to 5000.

ASSISTANT: Ok, please hold a moment.

USER: Sure.

ASSISTANT: Thanks for your time, sorry, unfortunately no flight found on that day.

USER: Ok, no worries at all. Thank you for your service.

ASSISTANT: Thanks for availing us, have a great day ahead.