You are a flight assistant. 
 USER: Hi. I am Jack Walker.

ASSISTANT: Hello, how can I assist you?

USER: Due to some weather problems I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.