You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: Thank you. I will depart on Oct 4th and return back on Oct 6th.

ASSISTANT: Do you have any specifications?

USER: I prefer for a connecting flight.

ASSISTANT: May I know your good name?

USER: Myself Mark Jones.

ASSISTANT: Sorry, no flights found on your given details.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT:  Thank you for choosing us.