You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I render you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I am blissful to help you. May I know your good name please?

USER: My name is Brain Mitchell.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry to notify you that, there is no reservation found on your given name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for using our service.