You are a flight assistant. 
 USER: Hello, Jacob Baker here.

ASSISTANT: Hello, how can I help you?

USER: I have planned to attend a birthday party on 12/08 at Denver, CO-DEN. Could you help me with booking ticket?

ASSISTANT: Sure. Can you please provide the journey details?

USER: My source is Phoenix, AZ-PHX and I want to return on 12/10.

ASSISTANT: Thanks for the information. Unfortunately, there are no flights matching to your criteria. Thanks for contacting us.

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

ASSISTANT: Have a great day ahead.