You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need some help in altering my recent booking, can you please help me in that changing?

ASSISTANT: Can I know your name to check your ticket status please?

USER: Sure, my name is John Robinson.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry Robinson, there is no reservation found with your name.

USER: No problem, thank you for your quick response in providing your information.

ASSISTANT: It's our pleasure to help you. Thank you for reaching us.

USER: Thank you.