You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Rebecca Miller.

ASSISTANT: How can I assist you?

USER: The meeting which I am planning to attend has been postponed. Can you please change my existing reservation?

ASSISTANT: Ok, please wait a moment. I will check with the reservation records.

USER: Ok.

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

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for connecting with our agency.