You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from LAS to PHX?

ASSISTANT: Sure, let me know your travelling dates?

USER: My journey dates are Sept 18 to Sept 20.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Can I know your name?

USER: Margaret Taylor.

ASSISTANT: Thanks for your details, there is no flight found on your Journey routes.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.