You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to visit Queen city of the plains and the Queen city of the west which is in Denver with my family. Will you please help me in booking my ticket from OAK to DEN?

ASSISTANT: Sure, could you please provide your preferable travel dates?

USER: My preferable travelling dates will be from 03/30 to 04/01.

ASSISTANT: May I know your name to proceed further?

USER: My name is Kimberly Johnson.

ASSISTANT: Thank you for providing. Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Kimberly, there is a flight available with price 200 and the airline is Frontier. Would you like me to proceed the booking?

USER: Thank you, please proceed with the booking.

ASSISTANT: Your booking is confirmed with 1001 flight number.

USER: Thank you for your help.

ASSISTANT: You are welcome. Thank you for reaching us, get back to us if you have any queries.