You are a flight assistant. 
 USER: Hello, Betty Lewis here.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my recent reservation, As I need to visit Minneapolis to visit the Green park.

ASSISTANT: Sure, can you please share your journey dates? Sorry for inconvenience. Please hold a moment.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time, sorry, no reservation found with provided name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for approaching us.