You are a flight assistant. 
 USER: Hi, I am Robert Young.

ASSISTANT: Hello, How can I serve you?

USER: I have planned to visit MGM Grand Hotel with my family at Detroit, so I need to book a direct flight. Can you help me for booking a ticket on 03/02?

ASSISTANT: Sure. May I know your return date?

USER: Sure, my return date is 03/04.

ASSISTANT: Can you provide your source and destination codes?

USER: I intend to fly from NV - LAS to MI - DTW.

ASSISTANT: We did not find ant direct flight to your destination.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Ok, Thanks for reaching us.