You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Rebecca Hernandez. I want to change my travel dates in my previous reservation, can you please help me with that?

ASSISTANT: Sure Rebecca Hernandez, I will help you.

USER: Thank you.

ASSISTANT: Sorry Hernandez, there are no active reservations under your name.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Most welcome, thank you for reaching out here.