You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please make a reservation from DCA to DFW to attend a marriage in Dallas?

ASSISTANT: Sure, could you please share your journey dates?

USER: My journey dates are on Oct 13th and 15th.

ASSISTANT: Do you have any class preference?

USER: I prefer economy class.

ASSISTANT: May I know your good name?

USER: My name is James Perez.

ASSISTANT: Is there any other specifications?

USER: I need a connection in between journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say this, there are no flights available as per your requirements.

USER: Ok, no problem. I will choose another source to reach my destination. Thank you.

ASSISTANT: Thank you for reaching us.