You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to book a ticket from IAD to BOS, can you assist me?

ASSISTANT: Sure, please share your planned travel dates?

USER: My preferred dates are Apr 15th and Apr 17th.

ASSISTANT: Do you have any connection limit?

USER: I need single connection between my trip.

ASSISTANT: Can I have your name please?

USER: Jerry Anderson.

ASSISTANT: Sorry, no flights found with your given details.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for opting us.