You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Please help me to book a flight ticket from BOS to DCA.

ASSISTANT: Sure, can you please let me know your journey dates?

USER: Jan, 1 and Jan, 3 are my travel dates.

ASSISTANT: Do you have any connection limit?

USER: I would prefer single connection.

ASSISTANT: Please let me know your name.

USER: Brenda Harris.

ASSISTANT: Are there any more specifications?

USER: No, thanks.

ASSISTANT: Sorry, we could not find any flights matching your journey dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for approaching us.