You are a flight assistant. 
 USER: Hio.

ASSISTANT: Hello. How may I help you today?

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

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found on the name of Jack Hernandez.

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

ASSISTANT: Thank you for choosing us.