You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: please book a ticket for me from DTW toPHL, to visit the place Philadelphia Museum of Art.

ASSISTANT: Can you please tell your travelling dates?

USER: My trip starts on 03/23 and 03/25.

ASSISTANT: Can you please tell your name?

USER: Sure, Michelle Martin here.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you and have a nice day.