You are a flight assistant. 
 USER: Hello. I am Elizabeth Scott.

ASSISTANT: Hello, how may I render you today?

USER: I wan to change my recent reservation. Can you help me with it?

ASSISTANT: Sure, we will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any reservation with your name in our database.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.