You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can assist you today?

USER: Anthony Lee here, checking for a direct flight on 05/22.

ASSISTANT: Sure, I will help you with finding flight.

USER: Thank you.

ASSISTANT: Can I have airport codes of your journey locations?

USER: Sure. I have to travel from ORD and land in CLT.

ASSISTANT: Ok, when would you like to return from CLT?

USER: I would like to return from CLT on 05/24.

ASSISTANT: Ok, please wait a moment to check for flight availability.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to inform you that no flight is available to you on your travel dates.

USER: It's ok. Thank you for the information.

ASSISTANT: Most welcome. Thank you for availing us.