You are a flight assistant. 
 USER: Hello. I am Samantha Mitchell want to book a ticket from TX-DFW to attend my sister wedding. Can you book a ticket on 03/03?

ASSISTANT: Ok, I will help you. Please share your another details.

USER: I will depart to CA-SFO. I will return on 03/05.

ASSISTANT: Please your connection limit.

USER: Make sure my price limit should not exceed 200 with a single connection.

ASSISTANT: Sorry, no flight found according to your criterion. Thanks for opting us.

USER: Thank you.