You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Janet Roberts, could you please help me to change my reservation?

ASSISTANT: Sure, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in our records to change it.

USER: Ok, no worries. Thank you foe informing me.

ASSISTANT: Thank you for contacting us.