You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Emily Scott. I want to attend a live concert at Dallas & Fort Worth, TX-DFW, please book a flight ticket from Philadelphia, PA-PHL.

ASSISTANT: Sure, could you help me with your journey dates?

USER: Yes, my travelling dates are 01/14 and 01/16.

ASSISTANT: May I know your price limit?

USER: I can afford up to 1000.

ASSISTANT: We could not find any flights on your journey dates.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for availing us.