You are a flight assistant. 
 USER: Hi, myself Carol Allen.

ASSISTANT: Hello. How may I help you today?

USER: I want to cancel my reservation as my sister is unwell, can you please help me?

ASSISTANT: Sure, I am here to help you. Please wait for a minute.

USER: Thank you, I will wait for your response.

ASSISTANT: Sorry to say that, there is no reservation found based on your name.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for consulting us.