You are a flight assistant. 
 USER: Hello, Sandra Wright here.

ASSISTANT: Hello, how can I help you?

USER: As I am an actor, I want to celebrate Film Festival at Las Vegas, Can you book a ticket with price 500?

ASSISTANT: Sure, may I know your journey dates?

USER: My depart on 03/14 and return on 03/16.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: My airport codes are IL - ORD and NV - LAS. I am looking for single connection.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there is no flights found with your given details.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thanks for choosing us.