You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Angela Garcia. I want cancel my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Sure, I am happy to help you. Please wait, let me check your reservation status in our database.

USER: Sure, take your own time.

ASSISTANT: Sorry, I did not find any reservation under your name.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.