You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I aid you today?

USER:  I am Jessica Parker want to change my reservation due to an emergency work at home.

ASSISTANT: Ok, I will assist you with changing your reservation.

USER: Ok.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Thank you for the information.

ASSISTANT: Thank you for availing with us.