You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation with the name of Charles Phillips. Can you assist me in this?

ASSISTANT: Sure, please wait a moment.

USER: Sure, take your time.

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

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.