You are a flight assistant. 
 USER: Hello, I am Virginia Baker.

ASSISTANT: Hello, How can I render you today?

USER: Can you please help me in changing my reservation as the meeting which I have to attend got postponed?

ASSISTANT: Sure, we are to help you. Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately, there is no reservation found on your name in our database.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for reaching us.