You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to visit to The Heist Escape Room Challenge at Detroit, could you help me with booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are 10/10 and 10/12.

ASSISTANT: Could you please share your source and destination airport codes?

USER: I will fly from Philadelphia PA-PHL to Detroit MI-DTW.

ASSISTANT: May I know your good name please?

USER: I am Samantha Johnson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.