You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Rebecca Johnson. I would like to travel from Washington to New York on vacation trip. Can you please book a ticket for me?

ASSISTANT: Yes, I can help you with that. Please provide city codes and travelling dates.

USER: My airport codes are DC-DCA and NY-JFK on the dates of 01/10 and 01/12.

ASSISTANT: Thank you for sharing details.

USER: Please make sure that the price must be under 200 with connection 1. Sorry, connection should be 0.

ASSISTANT: OK, give me a moment to check.

USER: Sure.

ASSISTANT: Unfortunately there is no flight matches your details.

USER: OK, that's fine.

ASSISTANT: Sorry for that, have a nice day.

USER: Thank you for your information.

ASSISTANT: Most welcome.