You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Jacob Carter.

ASSISTANT: Nice meeting you Jacob.

USER: I have to made some changes in my earlier reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure, I will wait for your response.

ASSISTANT: We regret that, there is no reservation with on your name in our records.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: Thank you for approaching us, hope you have a great day.