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

ASSISTANT: Hello, how can I be of your help?

USER: I have a plan to visit the Mercer Arboretum and Botanic gardens with my college friends in Washington, To enjoy by exploring the nature. Can you help me in reservation?

ASSISTANT: Sure, may I know your airport codes?

USER: Source and destination is from SFO to DCA.

ASSISTANT: Is there any connection restrictions?

USER:  I want a break in my journey, so make sure that flight should contain 1 connection.

ASSISTANT: Please mention your dates of travel?

USER: I want to fly on 04/01 and return on 04/03.

ASSISTANT: Thank you for providing your essential details. Unfortunately there is no flight found with your details.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for opting us.