You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Raymond Johnson, I want to book a direct flight to DFW from CLT.

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates are 04/16 and 04/18.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.