You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Ok, sure. Myself Betty Wilson.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.