You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Davis here.

ASSISTANT: How can I assist you today?

USER: Can you please book a ticket from DCA to DTW? As I'm planning to visit Detroit.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned departure and return travel dates are 19th and 21st of March.

ASSISTANT: Do you have any specifications?

USER: Yes, my connection limit is 1.

ASSISTANT: Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: That's ok, thank you for giving the information.

ASSISTANT: Welcome, have a great day.