You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand?

USER: My holiday vacation got postponed, can you help me to change my existing reservation?

ASSISTANT: Can you please help me with your name?

USER: Richard Roberts is my name.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok, no issue.

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

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.