You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me change my existing reservation which was made on the name of Kenneth Moore?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for reaching us.