You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Moore.

ASSISTANT: How can I assist you?

USER: I need at attend the workshop which is held at San Francisco SFO and which is only for Mechanical engineers. Could you please help me in booking a ticket with fare of 200?

ASSISTANT: Sure, I will help you. May I have your boarding point?

USER: Actually, I would start from Seattle SEA and land at San Francisco.

ASSISTANT: Please help me with your journey dates.

USER: I need to attend the workshop on 07/20, so I need to start on 07/19 and return to Seattle on 07/21.

ASSISTANT: Thanks for sharing your details. Sorry, there were no flights available for you.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.