You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Paul Brown.

ASSISTANT: Hello Paul.

USER: I want to Travel to Washington for my sister's birthday, could you help me in booking the ticket?

ASSISTANT: Sure, when would you like to travel?

USER: It's from 05/18 to 05/20.

ASSISTANT: Could you please provide your airport codes?

USER: The airport codes are from IAH to IAD.

ASSISTANT: Ok, there is a flight from Spirit airline with number 1001 with 1 connection is available for you.

USER: Please book the ticket.

ASSISTANT: Ok, your booking is done.

USER: Thank you for helping me out.

ASSISTANT: Thank you for reaching us.