You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kimberly Hall.

ASSISTANT: How may I assist you at this moment?

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

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

USER: Ok, I will wait for your response.

ASSISTANT: We regret to inform you that there is no reservation found on your name in our records.

USER: Ok, not an issue.

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

USER: Thank you for your information,.

ASSISTANT: Welcome.