You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rachel Collins here.

ASSISTANT: How may I assist you today?

USER: I want to travel from DFW to DTW for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling?

USER: My travelling dates are from 07/18.

ASSISTANT: Please wait a moment to check the flights.

USER: Please book my return ticket on 07/20. Make sure my connections limit is 1.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your required number of connections.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us, have a great day.