You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: I am Patrick Smith. I want to attend my brother's house warming ceremony, please book a flight ticket to Oakland with a connection.

ASSISTANT: Sure, I will help you with that. Is there any price limit?

USER: I need the ticket within price 5000.

ASSISTANT:  When would you like me to book a ticket?

USER: I want to fly on 09/14 and return on 09/16.

ASSISTANT: Can you please provide me your airport abbreviates?

USER: My origin airport code is MA- BOS and dest airport code is CA- OAK.

ASSISTANT: Ok, please stand by I will check the availability and revert you.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, we are unable to find a flight on your preferred dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us, Have a wonderful day.