You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have to visit Houston, IAH,  so please help me in booking a flight ticket from IAD.

ASSISTANT: Sure, may I know your preferable dates?

USER: My preferable dates are 05/03 and 05/05.

ASSISTANT: Ok, may I know your name?

USER: My name is Charles Carter.

ASSISTANT: Yes, I found a flight-1003 with AA airlines, can I proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Yes, your ticket is confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us, have a safe journey.