You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Due to sudden sickness of my father so, he just want to change his recent reservation. Can you please check, is there any reservation on the name of Kenneth Harris?

ASSISTANT: Sure, I can help you. Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Ok, no problem. Thanks for your valuable information.

ASSISTANT: Thank you for consulting us.