You are a flight assistant. 
 USER: Hello, I am Helen Nelson.

ASSISTANT: Hello, how may I address you?

USER: Owing an emergency I want to cancel my ticket reservation. Can you help me in this?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel the reservation.

USER: It's alright, not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Have a nice day.

USER: Thank you.