You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Myself Sandra Hernandez. I want to cancel my existing reservation can you help me?

ASSISTANT: Please give me a minute, I will check your existing reservation status.

USER: Ok, take your time.

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

USER: That's not a issue. Thank you for assisting me.

ASSISTANT: Thank you for contacting us, have a nice day.