You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Angela Campbell here. Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: Wait for some time I will check the reservations on your name and get back to you.

USER: Ok, I will wait.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thanks for approaching us.