You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am George Taylor. I have to attend an interview in QA software solutions at Oakland, can you please help me to book a flight ticket from HOU to OAK?

ASSISTANT: Sure, we are here to help you with that.

USER: Thank you.

ASSISTANT: May I know your journey dates, please?

USER: Sure, my trip dates are Dec 12 and Dec 14.

ASSISTANT: Do you have any other specifications?

USER: My class preference is economy.

ASSISTANT: There are no flights available as per your given details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.