You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: My name is Matthew Evans.

ASSISTANT: Welcome to flight booking agency Matthew Evans.

USER: I want to book a flight ticket from DEN to OAK. Please help me in booking a flight ticket.

ASSISTANT: Sure, I am oblige to help you with that. Can you please provide your preferable dates of travelling?

USER: Sure, my trip dates are from 08/07 to 08/09.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight in between my journey.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no direct flights are moving to your region with your requested dates of travelling.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us, have a great day.