You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book a ticket from DEN to OAK to go for Science festival?

ASSISTANT: Sure, can you share your trip dates?

USER: My journey dates are Mar 25 and Mar 27.

ASSISTANT: Do you have any preferences?

USER: I want single connected flight.

ASSISTANT: May I know your name?

USER: I am Gary Williams.

ASSISTANT: There is a connecting flight with number 1000 in airline JetBlue, the fare is 100 in economy class.

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.