You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I assist you?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out with this?

ASSISTANT: Sure, I will help you. May I know your good name?

USER: My name is Anna Hall.

ASSISTANT: Please wait.

USER: Ok.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for approaching us.