You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are on May 31st to June 2nd.

ASSISTANT: Please let me know your connection limit?

USER: I prefer a single connection.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, my name is Ryan Anderson.

ASSISTANT: Sorry, no flights available on your route.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.