You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Linda Wilson here.

ASSISTANT: How can I help you Linda?

USER: I want to change my reservation, due to some health issue. Can you please help me?

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Thank you.

ASSISTANT: Please hold on for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, I din't find any reservation on your name to change your reservation.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for availing us.