You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: I am Eric Martin. I want to change my existing reservation due to postpone of my document verification in college. Can you please help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a minute, I will get back to you with status of your reservation.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for your time, no existing reservation was found on the name of Eric Martin. Thank you for choosing us.

USER: That's ok, thanks for your kind support.