You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Will you please aid me in making an airline reservation from ORD to DCA?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My travel dates are July 24th and July 26th.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: The depart time should be afternoon.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single connection.

ASSISTANT: May I know your name for further process?

USER: Nancy Perez.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for reaching us.