You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Dennis Baker. I want to book a ticket from DCA to IAH, to visit the Houston Museum District. Can you help me with booking?

ASSISTANT: Sure, can you please give preferable travelling dates for booking purpose?

USER: Sure, my trip dates should be 09/19 and 09/21.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Baker, we found a flight with zero connections and fare of 500. Shall I proceed for booking?

USER: I need a connecting flight, can you find it for me if possible?

ASSISTANT: Ok, let me check.

USER: Ok.

ASSISTANT: Sorry, there is no flight available with a connection limit.

USER: It's ok, thanks for your checking.

ASSISTANT: Thank you for reaching us.