You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My event has been postponed and I want to change my travel dates, can you help me in changing my reservation?

ASSISTANT: Sure, I am happy to help you, give me a minute.

USER: Ok.

ASSISTANT: Can I know your name for changing reservation purpose?

USER: I am Kathleen Roberts.

ASSISTANT: I am sorry to say that there is no reservation found on your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.