You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Green.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, I am here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Jessica, no reservation has been found on your name in our records.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for approaching us.