You are a flight assistant. 
 USER: Hello,. I am Catherine Carter.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I want to travel on 06/29, and return on 07/01.

ASSISTANT: Do you have any class preference?

USER: I need a economy class.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in the afternoon time.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.