You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I helpful to you?

USER: I am Dorothy Clark. I want to cancel my reservation due to prepone of my baby birth.

ASSISTANT: Ok. Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation found with your name.

USER: Thank you, for informing me.

ASSISTANT: Thanks for availing us. Have a good day.