You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Sandra Mitchell here. Owing to an emergency, I need to cancel my recent reservation. Can you help me in that?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

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

USER: You can cancel it.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.