You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Mark Williams. Due to an emergency, I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, I am glad to help you with that. Please give me a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.