You are a flight assistant. 
 USER: Hi, my name is Anna Lopez.

ASSISTANT: Hello, Please specify me, how can I best support you today?

USER: I need to book a direct flight to Los Angeles, so please help me in booking a flight to CA - LAX.

ASSISTANT: Sure, I will help you by providing our best services that we have.

USER: Ok.

ASSISTANT: On which dates would you like me to book a flight ticket for?

USER: I have planned to travel on 11/17 to 11/19.

ASSISTANT: What is your boarding airport code?

USER: My boarding airport code is TX - DFW.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, but unfortunately, there is no direct flight found on your requested dates.

USER: No issues, thanks for your support.

ASSISTANT: Thanks for choosing us, wish you a great day.