You are a flight assistant. 
 USER: Hello, I am Carol Clark.

ASSISTANT: Hello, How can I help you.

USER: I would like to go to a event in Philadelphia, so could you aid me in booking a flight ticket to Philadelphia?

ASSISTANT: Sure, I will help you with that. May I know your preferable dates of travel?

USER: Sure, I would like to go on 02/13 and return back on 02/15.

ASSISTANT: Ok, do you want any connections in between journey?

USER: Ensure it is a single connecting flight.

ASSISTANT: Kindly mention your respective airport codes.

USER: My source and destination airport codes are DFW and PHL respectively.

ASSISTANT: Thanks for providing details, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, we are unable to provide flights on your respective dates of travel.

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

ASSISTANT: Thank you for reaching us.

USER: Welcome.