You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura Nelson.

ASSISTANT: How can I aid you today?

USER: I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, let me check your ststus in oue database.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry, we couldn't found any reservation in our database.

USER: Oh! It may not be booked properly due to server issues while booking. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.