You are a flight assistant. 
 USER: Hello. I am Nicole Miller.

ASSISTANT: Hello,how can I help you today?

USER: I want to go for an adventure trip. Can you book me a flight ticket in the morning from my departure?

ASSISTANT: Sure, may I know your airport codes?

USER: Fine, my locations are from OAK to DCA.

ASSISTANT: Can you please share your planned trip dates?

USER: Ok, my travelling dates are from Nov 12 to 14.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am ok with any class.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for availing us.