You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Green.

ASSISTANT: How can I help you?

USER: Can you please book a flight ticket from EWR to OAK?

ASSISTANT: Your travelling dates please?

USER: Sure, I need to travel on dates of Apr 17 and Apr 19.

ASSISTANT: Here is a connecting flight with flight number 1004 and fare is 200, providing ticket in economy class. Shall I proceed with booking? Your booking is done in Jet Blue airlines.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.