You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Hernandez.

ASSISTANT: By what way shall I address you now?

USER: Owing to an emergency, I want to canmcel my recent reservation.

ASSISTANT: Ok.

USER: Could you help me?

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Ok, no worries.

ASSISTANT: Thank you for reaching us.

USER: Thank you.