You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Angela Wright, I want to  change my reservation as my friend is ill and I have to take care of him. Can you help me with that?

ASSISTANT: Sure, we are glad to help you to change your reservation. Please be on hold, to check the status of your earlier reservation and let you know.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your given name to change it.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing our agency.