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

ASSISTANT: Hello, how may I assist you for the day?

USER: I would like to fly from Washington with the fare of 500, can you please book me a ticket?

ASSISTANT: Sure, can you please provide your travel dates?

USER: My travel dates are from 06/21 to 06/23.

ASSISTANT: May I know your journey points?

USER: My journey points are from IAD to SFO.

ASSISTANT: Is there any restriction for stopover?

USER: Yes, I need direct flight.

ASSISTANT: Ok, please wait I will get back to you in a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights found.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your kind help.