You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Phillips.

ASSISTANT: How may I assist you now?

USER: I would like to meet my friend at Philadelphia. So, please reserve me a flight ticket to reach PHL.

ASSISTANT: sure, may I know your travelling dates please?

USER: My planned journey dates are Apr 15 and Apr 17.

ASSISTANT: Can you provide me your arrival airport code?

USER: My take off airport code is DTW.

ASSISTANT: Do you have any price limit?

USER: My fare limit is 200.

ASSISTANT: Do you have any other specifications?

USER: I need a halt in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: No problem. Thank you for the information.

ASSISTANT: Thanks for reaching us, have a good day.