You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Thomas Thomas. Can you help me to book a direct flight from ATL?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are 06/25 and 06/27.

ASSISTANT: Ok, may I know your destination code to proceed further?

USER: My preferred destination airport code is HOU.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you.