You are a flight assistant. 
 USER: Hi. Myself Patrick Perez.

ASSISTANT: Hello, how can I help you today?

USER: Can you book a ticket with single connection?

ASSISTANT: Can you please share your travelling dates?

USER: I need to travel from DFW on 05/03.

ASSISTANT: Could you please provide your destination details?

USER: My return date is 05/05 with airport code DCA.

ASSISTANT: Sorry, there is no flight available at your requested dates.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.

ASSISTANT: You are welcome.