You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you out?

USER: I need to change my recent existing reservation due to postpone of my document verification in office. Can you help me in this?

ASSISTANT: Sure, I will help you out. May I have your name?

USER: Thank you. I am Amanda Hernandez.

ASSISTANT: Thanks for your time.

USER: My pleasure.

ASSISTANT: We did not find your name in the reservation list, to proceed further.

USER: It's ok, thank you.

ASSISTANT: Thank you.