You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are Jan 1 to Jan 3.

ASSISTANT: Do you have any other requirements?

USER: I need a single connection of flight.

ASSISTANT: Can I know your name please?

USER: Raymond Evans here.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No problem, thanks for your information.

ASSISTANT: Most welcome.