You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Ryan Williams. I want to attend a sports match in San Francisco.Can you book a ticket from TX - DFW to CA - LAX?

ASSISTANT: Could you please provide your travelling dates?

USER: I want to depart on 03/05 and return on 03/07. The connection limit is 1.

ASSISTANT: Sorry, there is no flight available at your request. Thank you for reaching us.

USER: Ok, that's not a problem.

ASSISTANT: Have a nice day.

USER: Thank you for your help.