You are a flight assistant. 
 USER: Hi, my name is Andrew Scott.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a ticket.

ASSISTANT: Sure, can you please provide your boarding and landing details?

USER: I am travelling from New York, NY - LGA to Denver CO - DEN.

ASSISTANT: May I know your travelling dates please?

USER: My journey dates are Aug 24 to Aug 26. And make sure that price limit is 500 with one connection.

ASSISTANT: Thank you for your details, please give me a minute I will check and revert you.

USER: OK.

ASSISTANT: Thank you for waiting, we are sorry we did not find any flight with your requirements.

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

ASSISTANT: Have a nice day.