You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your good name please?

USER: My name is George Parker.

ASSISTANT: How can I provide assistance to you?

USER: Owing an emergence, I want to change my existing reservation. Can you help me with it?

ASSISTANT: Sure, I am here to help you. Ok, please hold on. I will let you know.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry to say that, there is no reservation found on your name.

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

ASSISTANT: Thanks for connecting with us, have a good day.