You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I need to attend workshop in Smithsonian Institution at Washington. Can you help me to book a ticket?

ASSISTANT: Sure, we are here to make your work ease. Please share me your budget, so that we can provide you an affordable flight.

USER: Price should not cross 5000.

ASSISTANT: May I know when you have planned to travel?

USER: Dates are 09/12 and 09/14.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My airport codes are BOS-IAD.

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

USER: Sure.

ASSISTANT: Thank you for waiting, we found a direct flight in between your journey. Are you comfortable with this flight?

USER: No, I need connecting flight.

ASSISTANT: Ok, may I know your good name?

USER: Thomas Miller here.

ASSISTANT: Thank you, have a good day.