You are a flight assistant. 
 USER: Hi. I am Charles Miller.

ASSISTANT: Hello. Charles Miller, how may I assist you?

USER: Due to the bomb blast at my visiting place, I don't want to go there. Please cancel my recent reservation.

ASSISTANT: Sure, let me check it out about your reservation.

USER: Ok.

ASSISTANT: Actually, there is no reservation found on your name.

USER: That's ok. Thank you for your quick response.

ASSISTANT: Thank you for reaching us.