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, can you provide me your name?

USER: Sure, my name is Elizabeth Green.

ASSISTANT: Give me a moment please.

USER: Sure, take your time.

ASSISTANT: I am sorry to inform that there is no reservation by the name Elizabeth Green.

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

ASSISTANT: Thank you for reaching us.