You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please help me in flight ticket booking process from PHX to DEN?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: Thank you for your response, I want to take off on May 09 and book my return ticket also on May 11.

ASSISTANT: Do you have any connection limit?

USER: I will prefer 1 break in between my journey.

ASSISTANT: Any more specifications do you have?

USER: No.

ASSISTANT: May I know your name to book a flight ticket?

USER: Sure, my name is Ronald Williams.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for approaching us, hope you have a great day.