You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you? May I know your name please?

USER: I  want to book a flight ticket to go for a vacation with my family.

ASSISTANT: Ok. Can you please provide me your journey details?

USER: Ok, I am Brenda Baker. I need to start from Las Vegas, NV-LAS on 09/11 to Dallas & Fort Worth ,TX- DFW on 09/13.

ASSISTANT: Please give me moment I will check the details and revert you in a while.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry for the inconvenience, we did not found a flight matching your requirements.

USER: Fine, thank you for your service.

ASSISTANT: Thank you for connecting us.Have a pleasant day.