You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Kimberly Lee, want to travel from PHL to DTW. Please help me in booking.

ASSISTANT: Sure, on which dates you are planning to travel?

USER: Sure, my travelling dates are from 06/25 to 06/27.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.