You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you. Can I have your planned travel dates please?

USER: Sure, my travelling dates are Apr 27 - Apr 29.

ASSISTANT: May I know your name please for booking purpose?

USER: My name is Larry White.

ASSISTANT: Can I know your class preference?

USER: I need an economy class.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I am looking for a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Larry White, no flights has been found on your preferences.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for reaching us.