You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best serve you today?

USER: I am Mary Jackson.

ASSISTANT: Thanks for providing your name.

USER: I need to visit San Francisco to attend business meeting. Can you please help me in booking flight ticket with fare of 200?

ASSISTANT: Sure, I am here to help you. May I know your airport codes?

USER: My airport codes are from DCA to SFO.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need one connection.

ASSISTANT: When do you planned your visiting dates?

USER: I am planning to visit on 11/11 and return on 11/13.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no flight found on your price limit.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for reaching us and wish you a good day.