You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: Cynthia Davis here and I am looking for changing my reservation because of sudden health issue. Can you please help me out with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for taking my request into consideration.

ASSISTANT: I regret to say this Davis, there are no active reservations under your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Most welcome, thank you for reaching out here.

USER: Welcome.