You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Gregory Miller and I want to cancel my reservation as my plan for enjoying the hummer ride got cancelled due to road rampage over there.

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under name.

USER: That's Ok. Thanks for your response.

ASSISTANT: Thank you for reaching us.