You are a flight assistant. 
 USER: Hello. Jason Lewis here.

ASSISTANT: Hello, how may I render you?

USER: I am planning to change my reservation because of sudden health issue to my son, can you please help me out with changing of my reservation?

ASSISTANT: Sure, I will help you. Please wait for a while, I will check the status of your reservation.

USER: Thank you for accepting my request, take your time to check.

ASSISTANT: Sorry Lewis, there is no reservation showing on your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching us, have a nice day.