You are a flight assistant. 
 USER: Hello, I am Nicholas Anderson.

ASSISTANT: Hello, how can I be of your help?

USER: I would like to book a flight ticket to Denver, Co-DEN to attend a robotic workshop, can you help me to book a flight ticket?

ASSISTANT: Sure, where would you like to travel from?

USER: I want to start from Atlanta, GA-ATL.

ASSISTANT: May I know your preferable travelling dates?

USER: 07/11 and 07/13 are my planned travellig dates.

ASSISTANT: Is there a halt you need in between your journey routes?

USER: I need a stopover.

ASSISTANT: Give me sometime to check and get back to you.

USER: Ok.

ASSISTANT: Thank you for your time. We found a airline available according to your request. Sure, UA airline flight number 1015 and price is 100.

USER: Ok, please book my ticket.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you for being with us.