You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Emily Allen. I want to change my reservation as I am sick, please do that for me.

ASSISTANT: Yes, I will help you with that. Can you wait a moment I will check for the reservation in our records?

USER: Sure.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing our agency.