You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: Can you help me in booking my flight ticket from DTW to IAD?

ASSISTANT: Sure, I am here to help you. Can I have your good name to proceed further?

USER: I am Gary Davis.

ASSISTANT: Please help me with your travelling dates.

USER: My trip dates will be Oct 3rd and Oct 5th.

ASSISTANT: May I know your class preference?

USER: I am fine with any class.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Is there any other specifications for you?

USER: I prefer a flight which returns in the evening.

ASSISTANT: Sorry, no flights are available on your desired journey routes.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.