You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I'm Alexander Martin.

ASSISTANT: How should I help you at this moment? Glad to meet you Martin.

USER: Due to terrorist attack at my visiting location, I want to quit my trip. Can you please cancel my recent reservation?

ASSISTANT: Sure, I am happy to help you with that. Please be hold on for a moment and I will check the existing reservation status.

USER: Sure. carry on.

ASSISTANT: Sorry Martin, no reservation found under your name to cancel.

USER: Oh! may be I have done a wrong booking. Anyways thank you for your information.

ASSISTANT: Most welcome. Thank you for choosing us, have a great day.