You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I made a plan to enjoy the holidays at Lake Harriet, but I rescheduled the journey dates.

ASSISTANT: Ok.

USER: For this I need your help to change my existing reservation.

ASSISTANT: Sure, we are mirthful to help you.

USER: Ok.

ASSISTANT: Please, let me know your name to check the reservation on your name.

USER: Please change the reservation with the name of John Harris.

ASSISTANT: Thank you for providing your name, please wait a moment.

USER: Fine.

ASSISTANT: Thanks for your time. We did not find any reservation on your name.

USER: No worries at all. Thank you for your kind information.

ASSISTANT: Thank you for approaching us.