You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you now?

USER:  I am Justin Lopez want to visit Fremont Troll at  DC-DCA.

ASSISTANT: Ok.

USER:  Can you book a direct flight?

ASSISTANT: Sure. Kindly mention your source code.

USER: I will depart from Detroit, MI-DTW.

ASSISTANT: Help me with your travelling dates.

USER: My journey dates would be 10/03 and 10/05.

ASSISTANT: We found a connecting flight of price 100. Is it comfortable to you?

USER: Please do not proceed.

ASSISTANT: Ok. Thank you for opting us.

USER:  Thank you  for your help.

ASSISTANT: Have a great day.