You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Laura Campbell. I want to book a ticket from LAS to PHX, can you help me over that?

ASSISTANT: Sure, may I know your travelling dates?

USER: Ok, my trip dates are from May 17 to 19.

ASSISTANT: Do you have any requirements?

USER: Yes, I need a direct flight.

ASSISTANT: Sorry to say, there is no flight available for you.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.