You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: Could you please help me in changing my reservation, as my plan to visit my friend's house got postponed.

ASSISTANT: Sure, may I know your name?

USER: I am Kimberly Thomas.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.