You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Cynthia Johnson.

ASSISTANT: Ok.

USER: I have a business meeting in SFO, can you help in booking a flight ticket form DCA?

ASSISTANT: Can you please tell me your travelling dates?

USER: My date of journey is on 06/01 and I will back to DCA on 06/03.

ASSISTANT: Please wait a moment. Sorry Johnson, no flights are available in your route.

USER: That's ok .

ASSISTANT: Thank you for opting us.

USER: Thank you for your help.