You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carolyn Brown here.

ASSISTANT: How can I help you Carolyn?

USER: Can you please help me out in cancelling my reservation? As my planned trip has been cancelled.

ASSISTANT: Ok, please give me a minute.

USER: Sure, I'll wait for your response.

ASSISTANT: Carolyn, there is no reservation found with your details.

USER: Oh! May be my friend has already cancelled it. Thank you anyways.

ASSISTANT: Thank you for choosing us.