You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I want to change my existing reservation as my meeting with the client got postponed. Can you please help?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please share your good name for checking your recent reservation status?

USER: Sure, my name is Brandon Miller.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There is a reservation found on your name, so please share your new departure and arrival dates?

USER: My departure date is 08/17 and arrival dates is 08/19.

ASSISTANT: Ok, may I know your corresponding airport codes?

USER: I will travel from LAS to SEA.

ASSISTANT: There are no flights found on your requested dates.

USER: Not a problem, thank you for information.

ASSISTANT: Thank you for reaching us.