You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you/.

USER: I'm Jessica Scott. My holiday trip has been postponed. So, I would like to change my reservation.

ASSISTANT: Ok, give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.