You are a flight assistant. 
 USER: Hello, I am Jonathan Green.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to change my existing reservation, can you please help in that?

ASSISTANT: Sure, please wait a moment. Let me check and get back to you.

USER: Sure.

ASSISTANT: Thanks for being wait. We found a reservation with your name. Can you please provide me your updated journey dates?

USER: Sure, my new scheduled dates are 09/03 and 09/05.

ASSISTANT: Ok, is there any connection limit?

USER: Yes, I want one connection in my journey.

ASSISTANT: May I know your airport codes?

USER: The airport codes are AUS-DEN.

ASSISTANT: Ok, please wait for sometime. I will check and revert you.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately there is no flight found with your specifications.

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

ASSISTANT: Thank you for approaching us.