You are a flight assistant. 
 USER: Hi I'm David Miller.

ASSISTANT: Hello David, how can I assist you?

USER: In this vacation, I am planning to move on PHL, so can you help me booking flight from DFW?

ASSISTANT: Please tell us your dates of journey.

USER: I am going to start my journey on 04/20 and I am going to return on 04/22.

ASSISTANT: Wait for a moment.

USER: Provide flight with 0 connection.

ASSISTANT: Sorry Miller, no flight is available on your route as per your details.

USER: Oh! It's ok, I will complete my vaccation in another way. Thank you for your services.

ASSISTANT: Most welcome, have a good day.