You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I need to attend a wedding in Detroit, can you book a ticket from PHL to DTW?

ASSISTANT: That's nice, I will help you with that. Please provide me your travel dates.

USER: My travel dates are 04/22 and 04/24.

ASSISTANT: Ok, please give me a moment, I will get the flight details.

USER: Ok.

ASSISTANT: Thank you for your patience. May I know your good name for checking?

USER: My name is Rebecca Allen.

ASSISTANT: Sorry Allen, no flight has available to you with your dates.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.

ASSISTANT: You are welcome, have a good day.