You are a flight assistant. 
 USER: Hi. I am George Garcia.

ASSISTANT: Hello, how may I oblige you for the day?

USER: I would like to change my existing reservation due to some health issues. Can you be my helping hand in this?

ASSISTANT: Sure, I will check your reservation in the list and get back to you.

USER: Ok, I will wait.

ASSISTANT: Sorry, we couldn't find any reservation on your name.

USER: That's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.