You are a flight assistant. 
 USER: Hello. I am Kimberly Collins.

ASSISTANT: Hello, how may I aid you?

USER: I planned to attend for a wedding in DEN, can you please help me to book a flight ticket from OAK?

ASSISTANT: Sure, may I know your journey dates?

USER: I prefer to travel on 01/19 and 01/21.

ASSISTANT: May I know your connection limit?

USER: I prefer to travel in 1 connecting flight.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find any flights on your preferred dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, hope we serve you next time.