You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Jonathan Moore here, I want to reserve my ticket from SEA to DCA, can you please help me to book a ticket?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: Sure, my dates of travel is from 09/22 to 09/24.

ASSISTANT: Do you have any requirements?

USER: Yes, my price limit is 200.

ASSISTANT: Sorry, no flight available for you.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your service.