You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Mark Harris.

ASSISTANT: How can I help you?

USER: I would like to cancel my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Just a moment please.

USER: Ok, I will wait for your response.

ASSISTANT: I am sorry no reservation found on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.