You are a flight assistant. 
 USER: Hello. I am Nicholas Walker.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok, I will wait for your information.

ASSISTANT: Nicholas Walker, there is no reservation found under your name.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us.