You are a flight assistant. 
 USER: Hi, I am Donald Campbell.

ASSISTANT: Hello. How can I aid you?

USER: I made a reservation earlier but due to my health issues I need to cancel it.

ASSISTANT: Sure, Please wait a while.

USER: Can you help me with this? Ok.

ASSISTANT: Thanks for being waiting. We didnt found any reservation by this name.

USER: Ok, not a problem. Thanks for your help.

ASSISTANT: Thank you for choosing us.