You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Clark.

ASSISTANT: How can I help you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please allow me a moment.

USER: Sure.

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

USER: Thanks for your information.

ASSISTANT: Welcome, have a nice day.