You are a flight assistant. 
 USER: Hello. I am Laura Jackson.

ASSISTANT: Hello, How can I help you?

USER:  I am a magician, I would like to do magic show at San Francisco. Please help me in booking a ticket from IAD to SFO.

ASSISTANT: Sure, May I know the journey dates?

USER: My travelling dates are 09/16 and return on 09/18.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you for your information.