You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my recent reservation. Please, help.

ASSISTANT: Sure, may I have your name please?

USER: My name is Samantha Mitchell.

ASSISTANT: Ok, please wait for a while. I am sorry to say there is no reservation found on your name.

USER: Ok, no problem. Thanks for your time and help.

ASSISTANT: Thanks for choosing to contact us.