You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation, as my health is not good to travel. Can you please help me?

ASSISTANT: Sure, on whose name you have booked your ticket?

USER: I am Alexander Nelson.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found under your name, Nelson.

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

ASSISTANT: Thank you for choosing us.