You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to change my flight reservation as I am unwell, can you please help me?

ASSISTANT: Ok, please can I know your name to proceed with the amendment process?

USER: Thank you. I am Andrew Nelson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flight tickets been found on your name to change.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing our agency.