You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is John Young. I want to take my children to The Denver Museum of Nature & Science in Denver, can you please help me to book a flight ticket from OAK?

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: I will travel on Oct 27th and on Oct 29th.

ASSISTANT: May I know your destination airport code please?

USER: My destination airport code is DEN.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight with the connecting flight of fare 200 of Delta airline, are you ok with this booking?

USER: It looks good to me, please proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your kind help.

ASSISTANT: You are welcome.