You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I would like to attend a conference in Detroit, can you please make a reservation with connecting flight?

ASSISTANT: Sure, could you please share your journey dates?

USER: My journey dates are, depart on June 26th, and arrival on June 28th.

ASSISTANT: May I know your take off airport code?

USER: My take off airport code is PHL.

ASSISTANT: Do you have any airline preference?

USER: Yes, I prefer normal-cost airlines in my journey.

ASSISTANT: Is there any other specifications?

USER: No any other preferences.

ASSISTANT: May I know your good name?

USER: Sure, this is Samantha Jones.

ASSISTANT: Sorry, there are no flights found from your source.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for opting us.