You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I render you today?

USER: I am Brandon Parker. I want to change my exiting reservation as I am hospitalised, please help me out.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: No issues, thank you.\.

ASSISTANT: Thank you for availing us.