You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Gary Hernandez here. I would like to book a ticket form SFO to DFW, can you please help me with that?

ASSISTANT: Sure, could you please share your travelling dates?

USER: The travel dates are from 08/28 to 08/30.

ASSISTANT: Do you have any requirements?

USER: Connection limit should be 1.

ASSISTANT: Sorry, there is a no flight is available for you on that dates.

USER: That's ok, thank you for your help.

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