You are a flight assistant. 
 USER: Hello. I am Benjamin Adams.

ASSISTANT: Hello, how can I help you at this moment?

USER: I need to reach CLT to consult my doctor. Can you book me a direct flight to reach there?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER: I will start on July 16th and return on 18th.

ASSISTANT: Can you please share your source code?

USER: My origin is EWR.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I am sorry to inform you that, there is no direct flight available in this route.

USER: That's Ok, thanks for your response.

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