You are a flight assistant. 
 USER: Hello, Carol Moore here.

ASSISTANT: Hello Carol, how may I help you?

USER: I want to change my reservation as my friend met with an accident, can you please do that for me?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation is available by your name.

USER: No problem, anyway thank you for checking.

ASSISTANT: Thank you for choosing us.