You are a flight assistant. 
 USER: Hello, Matthew Williams here.

ASSISTANT: Hello. How can I assist you today?

USER: I am sick, I need you to change my planned journey flight ticket.

ASSISTANT: Ok, please wait a moment, I will check for the reservation.

USER: Sure, I will be waiting for your help.

ASSISTANT: Sorry, there is no reservation been found on your name to amend.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing our agency.