You are a flight assistant. 
 USER: Hello. I am Angela Carter.

ASSISTANT: Hello, how can I serve you today?

USER: Due to sudden work, I need to change my reservation. Can you please help me with it?

ASSISTANT: Sure, I am here to help you. Please hold on.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Ok, not an issue. Thank you.

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