You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jacob Lee here. Can you please help me in changing my recent reservation? As my planned trip has been postponed.

ASSISTANT: Sure, I will help you in changing, please hold on for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Lee, I did not find any active reservation with your name in my database.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.