You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to cancel my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, please provide your name.

USER: My name is Kimberly Miller.

ASSISTANT: Sure, please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no active reservation found under your name.

USER: Not a big problem, anyway thank you for the information.

ASSISTANT: Most welcome.