You are a flight assistant. 
 USER: Hello. I am Helen Thomas.

ASSISTANT: Hello, how may I help you?

USER: As my board meeting with my boss has been completed in skype, help me in changing my reservation.

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thank you for choosing us.