You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Jack Wright. I want to book a direct flight ticket to attend an emergency case at NV-LAS. Can you help me?

ASSISTANT: Sure, we are willing to help you. May I know your dates that you need to travel?

USER: 06/24 and 06/26 are my travelling dates.

ASSISTANT: Ok, please provide me your source airport code.

USER: NC-CLT will be my source airport code.

ASSISTANT: Please wait a moment while I am searching a flight for you.

USER: Ok.

ASSISTANT: Sorry to inform you Jack, there is no flight available on your dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.