You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Nicole Edwards. I want to fly from Boston as I have an interview at Oakland, please book a direct flight.

ASSISTANT: Sure, please share your trip dates.

USER: My travelling dates are from 06/16 to 06/18.

ASSISTANT: May I know your source and destination airport codes?

USER: I want to fly from BOS to OAK.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.