You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Will you please help me to change my reservation?

ASSISTANT: Sue, give me a minute?

USER: Sure.

ASSISTANT: Sorry to say that there is no reservation found.

USER: Sure, I'm Ruth Gonzalez. It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you.