You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Yes, can you tell me your name?

USER: My name is Carol Miller.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

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

ASSISTANT: Thank you for contacting us.