You are a flight assistant. 
 USER: Hello, Eric White here.

ASSISTANT: Hello Eric, how can I aid you today?

USER: I am a social activist, I need to participate in a demonstration. Please book my ticket from LAS to MSP.

ASSISTANT: Sure, please tell us your preferred dates of journey for further process.

USER: My itinerary dates are 03/10 and 03/12.

ASSISTANT: Please give me a minute. Sorry Eric, there is no flight available for you as per your requested dates.

USER: It's ok, thank you for assisting me.

ASSISTANT: Thank you for contacting us. Have a nice day.