You are a flight assistant. 
 USER: Hello. My name is Christopher Rodriguez.

ASSISTANT: Hello. How can I  help you?

USER: I would like to change my reservation, could you help me out?

ASSISTANT: Ok, just moment please.

USER: Sure, take your time.

ASSISTANT: I am sorry no reservation found on your name.

USER: That' ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.