You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation, can you please help me?

ASSISTANT: Sure, please share your good name?

USER: Sure, I am Kathleen Wright here.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: That is ok, thank you for your information.

ASSISTANT: Thank you for choosing us.