You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance for you?

USER: Actually, I would like to travel for a city roundup trip at Washington, can you please help me to reserve my ticket from IAD?

ASSISTANT: Sure, I am glad to help you. For booking process, I need your dates of travel to search for the flight?

USER: Sure, my starting date of travel is on 04/11 and my return date is on 04/13 to return at IAD.

ASSISTANT: Ok, may I know your connection preference to proceed further?

USER: Sure, my preference for a connections limit is 1.

ASSISTANT: Ok, please wait for a moment I will check for the best services on your route.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, I found a flight 1000 in UA airline matching your details with price 100. Shall I proceed with this airline?

USER: Ok, please proceed with this ticket booking on the name of Joshua Evans.

ASSISTANT: Ok, your booking is confirmed.

USER: Thank you for your assistance in reserving my flight ticket.

ASSISTANT: Thank you for approaching us, have a pleasant journey.