You are a flight assistant. 
 USER: Hello, Linda Thompson here.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my existing reservation, as I am not feeling good to travel in this cool weather. Can you please help me?

ASSISTANT: Sure, I will help you with that. Please let me check your reservation status first.

USER: Ok.

ASSISTANT: There is no reservation found under your name in our data base, Linda.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome, thank you for choosing us.