You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I have to change my travel dates in my previous reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, myself Kenneth Harris.

ASSISTANT: Thanks for your time. I have not found your flight reservation to change it.

USER: It's ok.

ASSISTANT: Thank you.

USER: I will check my mail once again. Anyway, thank you for your time.