You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Due to some personal issues, I want to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, may I know your name please?

USER: My name is Christopher Hall.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you.