You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please assist me in booking a flight ticket from PHX to DEN.

ASSISTANT: Sure, I am here to assist you. May I know your travelling dates please?

USER: My travel dates are from Mar 26th to Mar 28th.

ASSISTANT: Ok, do you need any break in between the journey?

USER: I want a single stopover in between my journey.

ASSISTANT: May I know your name please?

USER: I am Gary Lee.

ASSISTANT: Please let us know if you have any other preferences.

USER: No other preferences.

ASSISTANT: Wait a minute please.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no flights found with your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us, have a  nice day.