You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What type of service you are excepting from us?

USER: As my shooting got rescheduled, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that. Could you wait for a minute?

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name in our database. Please provide me your name?

USER: Sure, my name is Brandon Jackson. That's ok, thank you.

ASSISTANT: Thank you for approaching us.