You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I Benjamin Baker. Due to any emergency case I have to travel Los Angels, so for that purpose I have booked a flight ticket but the meeting got postponed to other dates that the area has effected with floods, can you please help me in changing my ticket booking?

ASSISTANT: I am happy to help you with that. Please wait for a minute.

USER: Ok, sure.

ASSISTANT: Benjamin Baker, I am sorry t say that there is no reservation found under your name.

USER: Ok, fine thank you for booking. Thank you for checking.

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