You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: Please book a flight ticket from DCA to DTW, so I can visit the art gallery. Can you help?

ASSISTANT: I am glad to help you with that. Can you please let me know your planned dates of your journey?

USER: Ok, please book the flight ticket for the date 07/18 and return date is 07/20.

ASSISTANT: Please wait.

USER: Ok, I will wait,.

ASSISTANT: Can you please provide your name for further process?

USER: Please book on the name Rachel Collins.

ASSISTANT: Sorry to say this Rachel, there are no flights which travel to your region.

USER: Not a problem, thank you for assisting me.

ASSISTANT: You are welcome, thank you for reaching out here.