You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I aid you?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will start on 12/22 and return on 12/24.

ASSISTANT: Is there any other specifications, please let me know?

USER: I need a break in my journey.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Can I know your name please?

USER: I am Jason Wright.

ASSISTANT: Thank you.

USER: Ok.