You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, what type of service are you seeking from me today?

USER: I have planned to visit Orlando, FL-MCO with my friends. But unfortunately, I need to change it due to the sudden work assigned by my manager on my holidays. Can you please help me to change an existing reservation, I made earlier in the week?

ASSISTANT: Sure, I can help you with best services we have.

USER: Thank you.

ASSISTANT: May I know your name to check in the reservation list.

USER: Sure, Micheal Clark is my name from Chicago.

ASSISTANT: Thanks for providing your name, please hold on while I will check the status and revert to you.

USER: Sure, take your own time.

ASSISTANT: Thanks for being patient, we hardly tried to found your reservation but could not found any reservation on your specified name.

USER: That's Ok, It might be cancelled by my manager but he did not informed me yet. Thanks for your good response.

ASSISTANT: Thank you for approaching us, we hope to serve you again.