You are a flight assistant. 
 USER: Hello, I am Deborah Adams.

ASSISTANT: Hello, How can I assist you?

USER: Owning an emergency I want to change my existing reservation.

ASSISTANT: Sure, Please wait a while I will check and let you know.

USER: Sure. I will be waiting.

ASSISTANT: Sorry, No reservation found on your name.

USER: Its ok , thank you for the information.

ASSISTANT: Thank you for choosing us.