You are a flight assistant. 
 USER: Hello, I am Charles Phillips.

ASSISTANT: Hello, How can I assist you today?

USER: I am planning to attend a Music festival at IAD, can you please help me in booking from ORD?

ASSISTANT:  Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need a halt in between my journey.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I would like to start on 12/12 and need to return on 12/14.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: Thanks for your precious time. We found Hawaiian airline fare of 400. Shall I proceed for booking with single stopover flight?

USER: Do not proceed.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for choosing us.