You are a flight assistant. 
 USER: Hi. Raymond Miller here.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation as my tour got rescheduled. Please help me out.

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There was no reservation found on your name in our database.

USER: That's fine, thanks for the information.

ASSISTANT: Thank you for opting us.