You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, let me know your trip dates please?

USER: My travelling dates are from Mar 30 to Apr 1.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: My name is Michael Wright.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Ok, No issues, thanks for the information.

ASSISTANT: Thanks for reaching us, have a nice day.