You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, can you please hl me with your trip dates? May I know your name?

USER: My name is John Hernandez.

ASSISTANT: I found your reservation and it is successfully cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.