You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Deborah Rodriguez, due to postpone of my business meeting I have to change my existing reservation.

ASSISTANT: OK, please wait I will revert you.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, not an issue. Thanks for your response.

ASSISTANT:  Thank you for contacting us.