You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you at this moment?

USER: Could you please help me to book a flight ticket from Detroit to attend my sister's marriage in Philadelphia?

ASSISTANT: On which dates would you like to travel?

USER: Sure, I intend to start my journey on 12/05 and my return date will be on 12/07.

ASSISTANT: Could you please tell me your connection limit?

USER: I am comfortable with any kind of flight .

ASSISTANT: May I know your airport codes please?

USER: My source and destination airport codes are DTW and PHL.

ASSISTANT: We found a Economy class with fare of 100 and a lay by in between the journey matches your schedule.

USER: Make sure, I want to return from PA in the afternoon.

ASSISTANT: To proceed further I need your good name please?

USER: I am Betty Campbell.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.