You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Brain Martin.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your specified name.

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

ASSISTANT: Thanks for contacting us, hope to serve you again.