You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am very busy with my meetings, so I am not able to complete my trip. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am willing to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Pamela King.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: That's ok, thanks for the information.

ASSISTANT: Thank you for reaching us, have a good day.