You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning for the trip with my childhood friends to Philadelphia,  PHL. So will you please search a flight ticket having a connection limit 1?

ASSISTANT: Sure, may I know your name please to proceed further?

USER: Yes, my name is  Amy Taylor.

ASSISTANT: When are you planning your journey, Amy?

USER: I have planned my journey on these following dates: 06/01 and 06/03.

ASSISTANT: Could you help me with your airport codes?

USER: I am located in Detroit, my source airport is DTW and the destination airport is PHL.

ASSISTANT: Amy, there are no flights available at this moment.

USER: That's ok, thank you for searching.

ASSISTANT: Thank you for choosing our services.

USER: I will choose any other way to travel. Thank you.

ASSISTANT: Welcome.