You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be at your service for the day?

USER: I am Mark Parker. I would like to participate in Mobile Food Distribution event, which is conducted by soldiers at Chicago, IL - ORD, will you help me in booking a flight ticket?

ASSISTANT: Sure, we are here to help you. Please, share your journey dates.

USER: My journey dates are 06/14 and 06/16.

ASSISTANT: Kindly, mention your origin airport code.

USER: My boarding point is Las Vegas, NV - LAS.

ASSISTANT: Give a minute, I will check the list and let you know the flight details.

USER: Sure.

ASSISTANT: No flights found on your journey dates. Thank you for reaching us, have a nice day.