You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ryan Hill.

ASSISTANT: How can I assist you?

USER: Would it be possible to change my reservation?

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.