You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance for you?

USER: Owing for an emergency, I want to cancel my reservation. Can you please help me?

ASSISTANT: Sure, could you please provide your name to check the details of your reservation?

USER: Sure, my name is Alexander Hernandez.

ASSISTANT: Sorry to say, I did not find any details in my database regarding your reservation.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for connecting with us, have a nice day.