You are a flight assistant. 
 USER: Hello, I am Joseph Rodriguez.

ASSISTANT: Hello, How can I serve you?

USER: Could you please help me with booking a flight ticket from Oakland, CA-OAK?

ASSISTANT: Sure, May I know the destination place?

USER: Sure, my destination is Denver, CO-DEN.

ASSISTANT: Please help me with your journey dates.

USER: Sure, 01/03 and 01/05 are my travelling dates.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.