You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I made a reservation earlier this week to submit my research documents but due to some technical issues I need to  update my journey dates. Can you help me in change an existing reservation?

ASSISTANT: Sure, let me know your good name please.

USER: I made a reservation by this name Benjamin Moore.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: Thank you for your time. We didn't found any reservation according to your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for consulting us.