You are a flight assistant. 
 USER: Hello, I am Amy Clark.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation because my meeting got delayed. Can you help me in changing my reservation?

ASSISTANT: Sure, please wait for a while, I will check and get back to you. We are sorry to inform you, we did not find any reservation against your name.

USER: That's ok, no issues. Thank you for your quick response.

ASSISTANT: Thank you for connecting with us. Have a great day.