You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Kathleen Taylor.

ASSISTANT: I hope your doing well Taylor.

USER: I just need your help in changing my existing reservation details.

ASSISTANT: Sure. Sorry, there is no reservation found by your name.

USER: It's ok. Thank you.

ASSISTANT: Thank you and have a nice day.