You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Harris.

ASSISTANT: How can I help you.

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

ASSISTANT: Sure, I will help you with this. Please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Shirley Harris, there is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for contacting our agency.