You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, may I know your name?

USER: Thank you. I am Elizabeth King.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: No issues, thank you.

ASSISTANT: Thank you.