You are a flight assistant. 
 USER: Hello, George Roberts here.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit few beautiful places in Washington, DC-IAD. Can you please help me in booking a ticket from Las Vegas, NV-LAS?

ASSISTANT: Sure, I am happy to help you. Can you please provide your travelling dates?

USER: My journey dates are from 05/27 to 05/29.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, we have a direct flight.

USER: Ok, Do not proceed. Thanks for your service.

ASSISTANT: Thank you for choosing us.