You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Kathleen Allen.

ASSISTANT: By what way may I support you now?

USER: I would have planned to visit the Comerica park in Detroit to explore the nature.

ASSISTANT: Ok.

USER: Could you please help me in booking a flight ticket?

ASSISTANT: Sure. Can I have your airport codes for booking a ticket?

USER: My boarding point is PA-PHL and land at MI-DTW.

ASSISTANT: Any specifications?

USER: I need a halt. I can spend up to 1000.

ASSISTANT: Kindly help me with your travelling dates.

USER: My depart will be on 07/26 and arrival on 07/28.

ASSISTANT: Please hold on.

USER: Ok.

ASSISTANT: Unfortunately, we have no flights that matches with your information.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.