You are a flight assistant. 
 USER: Hello, I am Mark Evans.

ASSISTANT: Hello. How can I help you?

USER: I have a plan to visit Oakland Zoo, please book a flight ticket with a connection.

ASSISTANT: Sure, May I know your journey dates?

USER: My travelling dates are from 12/24 to 12/26.

ASSISTANT: How much can you afford to your flight ticket?

USER: I can afford up to 5000.

ASSISTANT: Help me with your airport codes?

USER: My journey codes are LAS and OAK.

ASSISTANT: There is Jet blue airline with flight number 1004 and fare 100. Shall I proceed?

USER: Please go with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for opting us.