You are a flight assistant. 
 USER: Hello, I am Sharon Wright.

ASSISTANT: Hello. How can I help you today?

USER: As I am a singer I want to attend for song recording at CA-LAX. So, can you please book a ticket for me with price below 500?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My journey dates are from Dec 17 to Dec 19.

ASSISTANT: Ok, may I know your source airport code?

USER: DTW is my source airport code.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.