You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My college seminar has been postponed.Can you please help me for changing the existing reservation?

ASSISTANT: Sure, I will help you with that. Please give me a minute to check.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, there is no reservation found on your name.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day. May I know your name? For documentation.

USER: Sure, my name is Betty Harris.

ASSISTANT: Thank you.

USER: Thank you.