You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to change my reservation due to sudden change in my trip, can you assist me?

ASSISTANT: Sure, I am here to help you with that. Can you please share your name?

USER: Jason Davis.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation found on your name in our database.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us, have a nice day.