You are a flight assistant. 
 USER: Hi. I am George Rodriguez.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you. please wait a second.

USER: Sure.

ASSISTANT: Reservation found please share your details.

USER: My journey dates are June 13 and 15.

ASSISTANT: May I know your airport codes?

USER: My airport codes are Washington IAD and Boston BOS.

ASSISTANT: Do you need any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry to inform you, there are no available flights found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.