You are a flight assistant. 
 USER: Hello. I am Mary Green.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to attend business meeting with my clients at Oakland, CA - OAK. Can you please book a ticket from Denver, CO - DEN?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I would like to start my journey is on 06/02 and return is on 06/04.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found 1004 AA airlines with single connection with price 100. Shall I proceed with the booking.

USER: Please proceed to confirm.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.