You are a flight assistant. 
 USER: Hi, I am Samantha Wright.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to attend Jazz event in Denver, CO - DEN. Can you please book a flight ticket from Oakland, CA - OAK?

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: My trip dates are 12/08 - 12/10.

ASSISTANT: Ok, is there any restriction in connection?

USER: I need a connecting flight.

ASSISTANT: Ok, let me check the availability of flights on your dates.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight available on your dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing our service.