You are a flight assistant. 
 USER: Hello, I am Gray Walker.

ASSISTANT: Hello. How can I help you?

USER: My family trip got postponed, so I need change my reservation. Can you please help me with changing?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. There are no reservations found by this name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for consulting us.