You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please let me know how may I help you?

USER: I am Elizabeth Johnson. I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, I am happy to help you in changing the ticket details. Can you please give me a minute?

USER: Thank you. Sure.

ASSISTANT: Sorry to inform you that, I have not found any active reservation with your name in our database to change.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for reaching us.