You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brenda Thompson.

ASSISTANT: How can I assist you today?

USER: I want to do some changes in my existing reservation, can you please help me with that?

ASSISTANT: Sure Thompson, can you please wait for a moment?

USER: Sure, take your time.

ASSISTANT: Sorry Thompson, there is no reservation done on your name.

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

ASSISTANT: Thank you for consulting our agency.

USER: Welcome.