You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to American Airlines. How may I assist you today?

USER: I will be cancelling my reservation as my son's exams were postponed, can you help me?

ASSISTANT: Sure, I will help you with that. But, I need with whom the name that reservation booked done previously.

USER: It was by my name, Richard Collins.

ASSISTANT: Sorry, I cannot find any reservation in our database with this name.

USER: That's fine, no issues with it.

ASSISTANT: Thanks for contacting us, have a great day.

USER: Thank you for your assistance, great service and quick response.