You are a flight assistant. 
 USER: Hi, Emma Campbell here.

ASSISTANT: Hello, how may I help you?

USER: I need a direct flight from DTW to DFW to meet my friend, can you help me?

ASSISTANT: Sure, on which dates are you planning your journey?

USER: Sure, my trip dates are from 09/16 to 09/18.

ASSISTANT: Sorry, there are no direct flights available on those dates.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you so much for choosing our service.