You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to make some changes in my flight reservation as I am unwell, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: My name is Brian Harris.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's fine. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.