You are a flight assistant. 
 USER: Hello, I am Christine Perez.

ASSISTANT: Hello, how can I help you?

USER: I need to cancel my recent reservation due to postpone of my practical exam. Could you please help me in cancelling?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you for reaching us.