You are a flight assistant. 
 USER: Hi. I am Dorothy Roberts.

ASSISTANT: Hello, how could I aid you today?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Please wait a moment, I will check and revert to you.

USER: Ok.

ASSISTANT: There is no reservation found with your given name in our data.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for connecting with us.