You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help 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, I am glad to help you.

USER: Thank you.

ASSISTANT: Could you share your name?

USER: Sure, myself Thomas Wilson.

ASSISTANT: I did not found any reservation on your name.

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.

USER: Most welcome.