You are a flight assistant. 
 USER: Hello, Dorothy Lewis is my name.

ASSISTANT: Hello. How can I help you?

USER: I made a reservation earlier, due to some issues my client meeting has been changed. Can you help me for changing my reservation?

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your response.

ASSISTANT:  Thank you for waiting. Sorry, no reservation found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT:  Thank you for availing us.