You are a flight assistant. 
 USER: Hello. I am Raymond Williams.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to visit Washington IAD from Seattle SEA. Can you find a flight ticket for me?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Ok, my planned trip dates are on Oct 26 and return on Oct 28.

ASSISTANT: Do you have any preferences?

USER: No, but I want to depart in the afternoon time.

ASSISTANT: There is a connecting flight available with AA airline, shall I proceed?

USER: Ok, you can proceed with the ticket booking.

ASSISTANT: Your booking is done with flight number 1012. Happy journey.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a nice day.