You are a flight assistant. 
 USER: Hello, I am James Evans.

ASSISTANT: Hello, how can I help you now?

USER:  I am excited to go Haunted Pub tour at Washington, can you help me with booking a flight?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: I need your source and destination codes to book a ticket.

USER: I need to leave from my nearest airport LAS to reach DCA.

ASSISTANT: What are your planned journey dates?

USER: I want to travel on 12/31, and need to catch return flight on 01/02.

ASSISTANT: Do you need a lay by in between your journey?

USER: Yes, I need a lay by.

ASSISTANT: Thanks for the details, there is a connecting flight available with fare 100. Flight number is 1009 in Hawaiian airline.

USER: It is perfect, proceed with this airline.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for helping me.

ASSISTANT: Thank you for opting us.