You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Sure, my name is Patrick Martin.

ASSISTANT: Please allow me a moment. Patrick, there is no reservation found under your name.

USER: Sure, I will wait for your response. Anyways, that's fine.

ASSISTANT: Thank you for contacting us, have a great day.

USER: Thank you for checking.

ASSISTANT: You are welcome.