You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: May I know your good name please?

USER: I am Elizabeth Moore.

ASSISTANT: Please give me a moment.

USER: Ok.

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

USER: That'.

ASSISTANT: Thank you for approaching us.

USER: That's ok. Anyways, thank you.