You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Michael Miller.

ASSISTANT: How can I provide service to you?

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 holding on, there is no reservation found on your name.

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

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