You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you now?

USER: I need to travel from Detroit to attend a movie opening ceremony at Philadelphia. Can you help me book a connecting flight?

ASSISTANT: Sure, please share me your journey airport codes?

USER: They are from DTW to PHL.

ASSISTANT: May I know your planned journey dates?

USER: I am planning to leave on 08/12 and return on 08/14.

ASSISTANT: Please share me your budget for flight ticket?

USER: I can pay up-to 5000.

ASSISTANT: Thank you for the information, Sorry there is no flight available on your journey route on given date.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.