You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

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

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

USER: Thank you.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.