You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me in doing a reservation from DEN to PHX?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My trip dates are Sep 09 to 11.

ASSISTANT: Do you have any other preferences?

USER: I prefer business class which departs in morning time.

ASSISTANT: Give me a moment. Do you have any connection limit?

USER: Sure, I need a connecting flight.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Can I know your name?

USER: Gregory Taylor here.

ASSISTANT: Thank you for reaching us.