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: Ok, I will help you with that. Mean while may I know your name?

USER: I am Angela Jackson.

ASSISTANT: Sorry, no reservation found on your name to change.

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

ASSISTANT: Thank you for reaching us.