You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How can I aid you today?

USER: I need to visit Lyndon Baines Johnson library at Houston. Can you book me a flight ticket?

ASSISTANT: Can you forward your travelling details for further booking?

USER: I would like to leave between 05/26 and 05/28.

ASSISTANT: Share your airport codes,.

USER: I would like to start at IAD to IAH.

ASSISTANT: We are happy to inform you that there is a plane of 1005 with fare of 100 and a connecting flight. Shall I proceed with booking?

USER: It is perfect, You can proceed with the booking.

ASSISTANT: May I know your name for booking your ticket?

USER: I am Mark Lee.

ASSISTANT: Your ticket has been reserved with Delta airline. Thank you for opting us.

USER: Thanks for the help.