You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Michael Roberts. I have planned for the trip to Denver, so I need a flight ticket from Oakland. Can you please help me?

ASSISTANT: Sure, I am here to help you. Can you please help me with your planned dates of journey?

USER: Ok, the travel dates are 06/08 and 06/10.

ASSISTANT: Can you please help me with your location points?

USER: The travelling airport codes are OAK and DEN.

ASSISTANT: Sorry Roberts, there is no flights available to your destination point.

USER: It's ok, thank you for searching us.

ASSISTANT: Thank you for opting our service.