You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Could I know your name please?

USER: My name is Deborah Carter.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you.