You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Joseph Adams here, can you find a direct flight for me?

ASSISTANT: Sure, please share your airport codes with me.

USER: My locations are from IAH to LAS.

ASSISTANT: May I know your trip dates please?

USER: Sure, I would like to travel on 08/22 and 08/24.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Adams, no flight is available on your route IAH to LAS.

USER: It's ok, thanks for checking.

ASSISTANT: You are welcome.