You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you today?

USER: I am Ruth Carter. Can you please help me in change my existing reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for sometime, I will check the status and notify you.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found based on your name.

USER: It's ok, not a problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.