You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am Jonathan Williams, I want to book a flight to visit South Mountain Park at Phoenix. Can you book a connecting flight?

ASSISTANT: Sure, May I know the journey codes?

USER: I like to fly from Denver, CO-DEN and my destination is AZ-PHX.

ASSISTANT: Please help me with your travel dates.

USER: I will fly on 01/19 and return on 01/21.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us.