You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I aid you?

USER: Due to rejection of my visa from the airport authorities, I want to cancel my reservation.

ASSISTANT: Ok.

USER: Would you help me in ticket cancellation with the name of Barbara Adams?

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

ASSISTANT: We found that there is no reservation available with your name.

USER: No problem. Thank you for your quick response.

ASSISTANT: Thank you for availing us.