You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Benjamin Mitchell here, I want to reserve my ticket from IAD to MSP, can you please help me?

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

USER: Sure, my planned dates of journey are from Aug, 31 to Sep, 02.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a business class.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait.

ASSISTANT: There are no flights found found under your preferable details.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Welcome, have a great day.