You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: For further process, I need to know your name. Can you please provide me your name?

USER: Laura Lee.

ASSISTANT: Ok, please wait for a while. I will check with it and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.