You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to book a flight ticket to DEN from OAK, can you please help me out?

ASSISTANT: Sure, let me know your planned journey dates?

USER: Sure, my planned travelling dates are Oct 13 and Oct 15.

ASSISTANT: May I know your connection limit?

USER: Any connection is ok for me.

ASSISTANT: Do you have any other specifications?

USER: Yes, my depart time must be in evening.

ASSISTANT: Can you please share your name?

USER: Sure, my name is Timothy King.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.