You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Williams.

ASSISTANT: How could I aid you?

USER: I need to amend my reservation due to some issue, can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.