You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Please share your name?

USER: My name is Susan Mitchell.

ASSISTANT: Please wait, I will check and I will revert.

USER: Ok, I will wait.

ASSISTANT: Ok. Sorry, there are no reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.