You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please check for the flights for my journey to HOU? My source code is CLT.

ASSISTANT: Sure, can you share me your trip dates?

USER: My journey dates are from July 4th to July 6th.

ASSISTANT: Do you have any airline preference?

USER: No, thanks for asking.

ASSISTANT: Is there any other specifications?

USER: I need a direct flight for my journey.

ASSISTANT: May I know your name please.

USER: My name is Frank Davis.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Oh! That's fine. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are most welcome.