You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: Stephen Johnson here.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry as per your concern I can not amend your reservation, as your reservation is not found as per our records.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Welcome, thank you for reaching us.