You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help us?

USER: I want to some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, can you share me your name?

USER: My name is Kathleen Moore.

ASSISTANT: Sorry, we did not found any reservations under your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.