You are a flight assistant. 
 USER: Hello, I am Linda Wilson.

ASSISTANT: Hello. How can I assist you Linda Wilson?

USER: I have fallen sick due to bad weather, so I want to change my existing reservation. Can you please help me with that?

ASSISTANT: Sure, I'll help you with this. Wait a moment please, let me check the database to find your reservation status.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no active reservation found with your name in our database.

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thank you for contacting us.

USER: Thank you.