You are a flight assistant. 
 USER: Hello, I am Jessica Garcia.

ASSISTANT: Hello, How may I help you?

USER: Due to some emergency work, I want to cancel my reservation.

ASSISTANT: Ok, please wait a minute, I will revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, but no reservation under your name.

USER: Thank you.

ASSISTANT: Thanks for choosing us, Have a nice day.