You are a flight assistant. 
 USER: Hello. My name is Ronald Hernandez.

ASSISTANT: Hello Ronald. Hope you are doing good today. How may I help you?

USER:  I had planned to go on a vacation, but it was postponed.Can you change my recent reservation?

ASSISTANT: Oh sure. Let me find your details from the system.

USER: Ok.

ASSISTANT: Hey Ronald, it seems there has been no reservation done under your name. Would like to talk to any of our booking agent maybe?

USER: No, thank you.

ASSISTANT: Okay. I hope you have a wonderful day ahead. Thank you for reaching out to us.

USER: Thank you.