You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: I am very busy with my meetings, so I am not able to complete my trip. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please share your name for further process?

USER: My name is Jeffrey Lewis.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you Jeffrey Lewis, there is no reservation found with your name in our records.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us with a query.