You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me booking a flight ticket from DEN to PHX?

ASSISTANT: Sure, Please provide me your itinerary travel dates.

USER: I will start on 08/30 and return on 09/02.

ASSISTANT: Could you let us know if you have any class preference?

USER: No.

ASSISTANT: May I know about your connection limit?

USER: I need a break in my journey.

ASSISTANT: May I know your name please?

USER: I am Catherine Walker.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT:  Catherine Walker. I regret to inform that there are no flights on your route with the given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.