You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my recent reservation, Can you please help me in that?

ASSISTANT: Sure, We are here to help you. May I know your name?

USER: Thank you. My name is Timothy Jones.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.