You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to attend music concert at PHX, can you please help me with booking a flight ticket from LAS?

ASSISTANT: May I know your travelling dates?

USER: I would like to take off on Sept 16 and return on Sept 18.

ASSISTANT: Please let me know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other preference?

USER: I prefer business class.

ASSISTANT: Can I know your name please?

USER: My name is Eric Lee.

ASSISTANT: Sorry, no flights available on your route.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.