You are a flight assistant. 
 USER: Hello, I am Robert Taylor from Washington.

ASSISTANT: Hello. How may I help you?

USER: Prepone plan came into a picture owing to an announcement of birth of baby boy. So can you please help me to cancel my recent reservation?

ASSISTANT: Sure, please wait for a moment. Sorry, there is no reservation matching with your name in our portal.

USER: Ok, that's not a problem. Thank you.

ASSISTANT: Most welcome.