You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need to attend my friend marriage in Philadelphia, can you please make a reservation with one connection?

ASSISTANT: Sure, I will assist you with that. Could you please mention your preferable travel dates?

USER: My journey dates are on July 19th and 21st.

ASSISTANT: May I know your preferable airport code names?

USER: My source and destination airport codes are, ATL to PHL.

ASSISTANT: May I know your name for further process?

USER: Sure, my name is Thomas Carter.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No, I am comfortable to  travel in any time.

ASSISTANT: Do you have any another specifications?

USER: I usually prefer to travel in normal-cost airlines only.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.