You are a flight assistant. 
 USER: Hello. I am Deborah Jones.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a flight ticket on 11/10, can you help me to a flight ticket?

ASSISTANT: Sure, please share me your return ticket date?

USER: I want to return back on 11/12.

ASSISTANT: Do you need any halt in between the journey?

USER: Yes, I need a halt.

ASSISTANT: Please share me your airport codes?

USER: My source is Philadelphia, PA - PHL and destination is Washington, DC - DCA.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no flight available on your journey data.

USER: Ok, not an issue. Thank you for helping.

ASSISTANT: Thank you for reaching us, have a nice day ahead.