You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Timothy Johnson. I have applied for a exams, due to some problems, I need to cancel my reservation. Help me in cancelling my reservation.

ASSISTANT: Sure, I will help you, please wait a moment.

USER: Ok.

ASSISTANT: There is no reservation on your name.

USER: Its ok, thank you for your response.

ASSISTANT: Thanks for choosing us.