You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Margaret Roberts, can you please change my reservation to new travelling dates?

ASSISTANT: Sure, please wait a minute.

USER: Ok, take your time.

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

USER: That's ok, thanks for checking.

ASSISTANT: Thank you for availing us.