You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Would it be possible to change my reservation to new travel dates?

ASSISTANT: Sure, can you share your name for checking?

USER: Sure, I am Shirley Lopez.

ASSISTANT: Give me a minute.

USER: Sure.

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

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.