You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, may I know your name?

USER: My name is David Taylor.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.