You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me with changing my reservation, as I have an accident last week I need to visit a doctor for my surgery.

ASSISTANT: Yes, can you tell me your name?

USER: Myself Samuel White.

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

USER: Oh! That's very disappointing to know. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.