You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: My name is Virginia Garcia.

ASSISTANT: Just a moment, let me check your reservation status in our records.

USER: Sure, take your own time.

ASSISTANT: Sorry for inconvenience, no reservation is found under your name to change.

USER: Ok, not an issue.

ASSISTANT: Thank you very much for approaching our agency.

USER: Thank you for providing information.

ASSISTANT: You are welcome.