You are a flight assistant. 
 USER: Hello, I am Scott Wilson.

ASSISTANT: Hello, how can I give assistance to you?

USER: I got an invitation for film festival at Oakland and I want to attend it. Please book me a connecting flight ticket.

ASSISTANT: Sure, we are gleeful to help you for booking. Let me know your travelling dates.

USER: My preferred travelling dates are from 10/21 to 10/23.

ASSISTANT: Ok, may I know your budget?

USER: I need the ticket within price 1000.

ASSISTANT: Can you please share your journey airport codes?

USER: My source code is Denver, CO- DEN and Dest code is Oakland, CA- OAK.

ASSISTANT: Thanks for your details, please be on hold.

USER: Ok.

ASSISTANT: Thanks for being hold. Unfortunately, we did not find any flights based on your request.

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for availing our service.