You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am James King. Can you help me in booking from DFW to DCA, as there is a business meeting to attend?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please share your travelling dates.

USER: My trip dates are Mar 4 to Mar 6.

ASSISTANT: Do you have any connection preference?

USER: I need a connecting flight which return in afternoon.

ASSISTANT: Please share your other preferences.

USER: I just have above mentioned preferences.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, we didn't find any flights with your details.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us, have a good day.