You are a flight assistant. 
 USER: Hello, I am Rachel Carter.

ASSISTANT: Hello,. How shall I assist you ?

USER: I want to book a ticket to CA - SFO to attend my friends fashion show.

ASSISTANT: May I know your travelling dates ?

USER: My journey starts on 03/13 and return on 03/15.

ASSISTANT: Please specify from which location you will be departing.

USER: My source is FL - MCO and need single connection with price limit 5000.

ASSISTANT: I regret there is no flight.

USER: OK, no problem. Thank you, for the information.

ASSISTANT: Thanks.