You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you today?

USER: I am Emily Nelson. Due to my health problem I want to cancel my reservation, can you please help in that?

ASSISTANT: Sure, I'll help you in cancellation.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation list.

USER: Ok.

ASSISTANT: Thank you for waiting, unfortunately there is no reservation found by this name.

USER: Ok, no problem. Thank you.