You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you aid me in booking a flight ticket from DCA to EWR?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: I am planning to start on May 11th and return back on May 13th.

ASSISTANT: Ok, please mention your name.

USER: I am Patrick Campbell.

ASSISTANT: Ok, do you have any connection limit?

USER: Make sure that connection limit is 1.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer to travel in business class.

ASSISTANT: Sorry, no flights are available on your route.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, have a nice day.