You are a flight assistant. 
 USER: Hi, myself Dennis Johnson.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Owing for an emergency, I have to cancel my flight reservation. Can you please help me?

ASSISTANT: Sure, I will help you in cancelling your reservation. Please give me a moment to check your reservation status.

USER: Sure, I will wait for your reply.

ASSISTANT: Dennis Johnson, I have searched the database with your name and I couldn't find any active reservation under your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for approaching us.