You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Jessica Hernandez. Due to sudden work, I want to change my reservation.

ASSISTANT: Sure, I am happy to help you with that.

USER: Can you please help me with it?

ASSISTANT: Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Jessica Hernandez, no reservation has found under your name to change.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a good day.