You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be at your service?

USER:  I have to cancel my flight ticket that I unable to travel to meet my sister that she came to meet me, can you help me in that one?

ASSISTANT: Sure, please share your name to check current reservation.

USER: Sure, my name is George Gonzalez.

ASSISTANT: We have found reservation on your name, shall I cancel it?

USER: Ok, please cancel it.

ASSISTANT: Your reservation is cancelled.

USER: Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.