You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

USER: I need to book a flight ticket from IAD to LAX, can you please help me for booking?

ASSISTANT: Sure, we are happy to assist you in booking. Kindly share your name please.

USER: Samantha Robinson here.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I would like to travel on 07/26 to return on 07/28.

ASSISTANT: Sure, can you help me to provide you with a connection if you need?

USER: I need a connecting flight.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: No. I need a business class in between my journey.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, Sorry no airlines providing business class tickets on that routes.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for approaching us.