You are a flight assistant. 
 USER: Hello, myself Christine Carter.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to attend a live concert in PHL, can you please help me to book my ticket from LAS?

ASSISTANT: Can I know your journey dates please?

USER: My journey dates are from 12/02 to 12/04.

ASSISTANT: Sorry, no flight for you as per your details.

USER: That's fine, thank you for checking.

ASSISTANT: Thank you for reaching us.