You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book flight ticket from IAD to DFW?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are Jan 6 and Jan 8.

ASSISTANT: May I know your connection limit?

USER: I am comfortable with any flight.

ASSISTANT: Do you have any other requirements?

USER: I would like to depart in the afternoon.

ASSISTANT: May I know your name please?

USER: I am Stephanie Phillips.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.