You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Due to some health issue, I want to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you with that. Can I know your good name?

USER: I am Thomas Walker.

ASSISTANT: Please wait for a minute.

USER: Ok, I will wait.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Ok, Thank you.

ASSISTANT: Thank you for approaching us.