You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Sarah Martinez. I need to cancel my recent reservation due to postpone of my conference.

ASSISTANT: Sure, let me check the status and get back to you.

USER: Could you please help me in doing that?

ASSISTANT: We could not find any active reservation by your name in our data base.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.