You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: My name is Carolyn Miller.

ASSISTANT: How shall I help you?

USER: Due to some personal issues, I would like to change my existing reservation. Can you help me?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: No reservation found by name Carolyn Miller.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you. Have a nice day!.