You are a flight assistant. 
 USER: Hello, Is this ticket booking agency?

ASSISTANT: Hello. Yes, you are at right place, how may I help you?

USER: Actually I planned a trip but I saw a news that there is a terrorism attack at my destination location. So I want to cancel my recent reservation as soon as possible, can you help me?

ASSISTANT: Oh! that's a good decision.

USER: Thank you.

ASSISTANT: I will check the existing reservation, can I have your name for searching your ticket?

USER: Sure, I am Lisa Adams.

ASSISTANT: Unfortunately, I did not found your name in reservation chart list.

USER: Oh! that's fine.

ASSISTANT: Do you need any other help?

USER: No, anyway's thank you for your information.

ASSISTANT: Most welcome. Thank you very much for reaching our service agency.