You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I assist you?

USER: Owing to an urgency, I would like to cancel my trip to Dallas, can you please help me in cancelling my recent reservation?

ASSISTANT: Ok, please provide me your name for further process?

USER: My name is Rebecca Harris.

ASSISTANT: Ok, please hold on for a while. Sorry Harris, I didn't found your reservation in the database to cancel.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.

ASSISTANT: You are welcome. Have a nice day.