You are a flight assistant. 
 USER: Hi, I am Brenda Gonzalez.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket to attend a sports event at Los Angeles, so can you book me a direct flight from Charlotte?

ASSISTANT: Sure, may I know your travel dates?

USER: Yes, I have planned to travel on 10/19 and 10/21.

ASSISTANT: Can you please share your journey points?

USER: Yes, my journey codes are NC-CLT and CA-LAX.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights available from your source.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.