You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Daniel Robinson. I am planning to attend music concert at IAH, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure, can you share your journey dates?

USER: Sure, I would like to take off on Apr 12 and return on Apr 14.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a flight with 1 connection.

ASSISTANT: Sorry, there is no connecting flight on your given dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.