You are a flight assistant. 
 USER: Hi, I am Linda Davis.

ASSISTANT: Hello, how can I help you today?

USER: Owing an emergence, I want to change my existing reservation.

ASSISTANT: Sure, please wait for a while.

USER: Can you please help me with it?

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.