You are a flight assistant. 
 USER: Hi, John Miller here.

ASSISTANT: Hello, How can I help you?

USER: I want to attend to my daughter's cultural event in her school at Las Vegas, NV - LAS on 08/09, Can you please help me?

ASSISTANT: Sure, May I know the return date and source point?

USER: Sure, My origin is Philadelphia, PA - PHL and return date is 08/11.

ASSISTANT: Sorry to tell that there is no flight found on your specifications.

USER: Ok, no issue. Thanks for your information.

ASSISTANT: Thank you for contacting us.