You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Gary Parker. I want you to make my flight reservation from CLT to LAS, please help me.

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, I will start my journey on Oct 20 and I will return in the morning on Oct 22.

ASSISTANT: Do you have any requirement?

USER: Yes, I prefer for a single connection flight.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry Gary Parker, there is no flight in your route.

USER: Sad to hear that. Anyway, thank you.

ASSISTANT: Thank you for reaching us.