You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patrick Walker.

ASSISTANT: How may I help you today?

USER: Due to some personal issues, I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure, I am here to help you with that. Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name in our database.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.