You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to change my reservation on the name of Stephen Johnson?

ASSISTANT: Sure, we are here to help you out.

USER: Thank you for accepting my request.

ASSISTANT: Please wait for a while, I will check the reservation list and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your given name.

USER: No issues, thank you for your service.

ASSISTANT: Thank you for reaching us.