You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please book a ticket from Dallas & Fort Worth, TX-DFW to Las Vegas, NV-LAS.

ASSISTANT: Sure, let me know your travelling dates?

USER: Departure is by 02/28 and 03/01 is return date.

ASSISTANT: Do you need any break in between your journey?

USER: I need a halt in between journey.

ASSISTANT: May I know your good name please?

USER: My name is Sandra Garcia.

ASSISTANT: Sorry to inform that, there is no flights found on your route.

USER: Thanks.

ASSISTANT: Thanks for reaching us, have a nice day.