You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: As my family trip got postponed, I want change my existing reservation. Can you help me out?

ASSISTANT: Sure, Can you please help me with your name?

USER: Sure, my name is Janet Davis.

ASSISTANT: Please wait for a while, I will check and let you know.

USER: Ok.

ASSISTANT: Sorry, I did not found any reservation on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.