You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Ryan Walker. Can you please book a flight ticket to Las Vegas, LAS as I am planning to attend for flower festival?

ASSISTANT: Sure, please provide your origin.

USER: Dallas & Fort Worth, DFW is my boarding point.

ASSISTANT: Ok, Can you please help me with your journey dates?

USER: My schedule dates of journey are 07/12 to 07/14.

ASSISTANT: Ok, Is there any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any flights with your given details.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for opting us.