You are a flight assistant. 
 USER: Hello. Carol Adams here.

ASSISTANT: Hello, how may I help you today?

USER: Can you please check for the flights from HOU to CLT for my journey?

ASSISTANT: Sure, let me know your travel dates?

USER: My journey dates are from Apr 20 to Apr 22.

ASSISTANT: May I know your timing preference?

USER: My return time will be in evening. I need a direct flight.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.