You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to change my reservation due to my planned event got postponed so please help me with changing my reservation.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: Sure, please check the reservation with my name Cynthia Martin.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name in our records.

USER: Oh! May be booking has not done properly while booking. Anyway, thank you for your help.

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

USER: Welcome.