You are a flight assistant. 
 USER: Hi. I am Angela Walker.

ASSISTANT: Hello, how may I serve you today?

USER:  I want to cancel my reservation due to sudden postpone of my fashion show competition at Dallas. Can you help me in my cancellation?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Not an issue, thank you for your help.

ASSISTANT: Thank you for reaching us.