You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Laura Allen, my holiday trip has been postponed.So, I would like to change my reservation. Can you help me to change my reservation?

ASSISTANT: Sure, hold on for a moment please.

USER: Ok.

ASSISTANT: Sorry to say this Laura, there are no reservation found on your name.

USER: Oh! ok, thank you for the information.

ASSISTANT: Thank you for reaching us. Have a good day.