You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at  this moment?

USER: I am Elizabeth Robinson. Will you please help me in changing my reservation as the food festival which I have planned to attend got postponed?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for few minutes.

USER: Ok.

ASSISTANT: Sorry we couldn't find any reservation against your name in our database.

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

ASSISTANT: Thank you for connecting with us.