You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you. May I know your name to check your reservation status?

USER: My name is Barbara White.

ASSISTANT: Ok, please wait for a while. I will check with it and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that, we have not found any active reservation on your name to proceed further.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.