You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I'm James Martin. I want to attend a sports event in Washington.Can you book a ticket from TX - HOU to DC - DCA?

ASSISTANT:  Sure, may I know your dates of journey please?

USER: I want to depart on 12/27 and return on 12/29. The connection limit is 1.

ASSISTANT: Sorry, there is no flight available with your details.

USER: That's Ok.

ASSISTANT: Thank you for contacting us.

USER: Anyway thank you for your help.

ASSISTANT: You are welcome.