You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My trip was postponed and I want to change my reservation, can you help me?

ASSISTANT: May I know your name please?

USER: My name is Brandon Martinez.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for reaching us.