You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Can you avail me to book a flight from LAX to IAD?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are Jan 25 and 27.

ASSISTANT: Do you need any break?

USER: Yes, I need it.

ASSISTANT: May I know your name?

USER: Brian Phillips.

ASSISTANT: Is there any other specifications?

USER: I prefer to travel in business class and depart time should be evening.

ASSISTANT: Ok. We found a connecting flight with an Delta airlines, flight number:1004.

USER: If the flight matches above criteria, then proceed.

ASSISTANT: Your flight ticket has been reserved with an business class.

USER: Thanks for the support.

ASSISTANT: Thank you for reaching us.