You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please help me to modify my travel dates as my trip got postponed?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your details in our reservation list?

USER: My name is Kathrine Taylor.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Kathrine Taylor, sorry to inform you that there is no reservation found on your name to do modification.

USER: No problem, thank you for your help.

ASSISTANT: Thank you for reaching us.