You are a flight assistant. 
 USER: Hello, myself Justin Gonzalez.

ASSISTANT: Hello Justin, how can I assist you?

USER: I would like to visit Chicago to meet my brother, could you please help me in booking a ticket from ATL to ORD?

ASSISTANT: Sure, may I know your preferred journey dates?

USER: My planned journey dates are 12/16 and 12/18.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for utilising our services.