You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: My name is Jonathan Robinson. I want to book a flight ticket with a price limit of 1000 for attending my friend marriage.

ASSISTANT: Ok, may I know your journey dates?

USER: My departure day is 09/04, return day is 09/06.

ASSISTANT: Ok, can you please assign your journey airport codes?

USER: My source and destinations are CA-OAK, CA-SFO. And connections limit is one.

ASSISTANT: Thanks for providing information. Please wait for a while, I will check and notify you.

USER: Ok.

ASSISTANT: Sorry for inconvenience, we did not find any flights based on your criterion.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for availing us, have a great day.