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

ASSISTANT: Hello, how can I help you today?

USER: I would like to meet my childhood friend in Oakland, OAK. Can you please help me to book a ticket from DEN?

ASSISTANT: Sure, please share your planned trip dates?

USER: My travelling dates will be on 11/16 to 11/18.

ASSISTANT: Ok, any other requirements to be met?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.