You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how  may I help you?

USER: I want to cancel my recent reservation, due to my manager does not approved my leaves. Can you help me in that?

ASSISTANT: Sure, I will help you in that cancellation.

USER: Thank you.

ASSISTANT: On whose name you have reserved your flight ticket?

USER: I have reserved the ticket on the name, Justin Miller.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: That's ok, not an issue. Thanks for your help.

ASSISTANT: Thank you for reaching us.