You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I assist you?

USER: I made a reservation earlier this week , but I have to cancel it. Can you help me with that?

ASSISTANT: Sure, can I know your please? Name.

USER: My name is Christopher Young.

ASSISTANT: Please give me couple of minutes. I will check and let you know the details.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting. Sorry for the inconvenience,we did not found any previous reservation on your name.

USER: OK, thanks for your kind information.

ASSISTANT: Thank you for contacting us.