You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jonathan Clark.

ASSISTANT: How may I assist you now?

USER: I want to travel on these days that is on 10/15 and back on 10/17. Can you find a flight ticket for me?

ASSISTANT: Jonathan Clark, can you please share your desired airport codes for this journey?

USER: Ok, my airport codes are from ATL to IAH.

ASSISTANT: Sorry for the inconvenience, there are no flights available on your requested dates.

USER: Ok, that's fine.

ASSISTANT: Thank you for choosing our services.

USER: Thank you for your information.

ASSISTANT: Have a nice day.