You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel to ORD for a conference meet and I want my boarding from SFO.

ASSISTANT: Sure, may I know your planned trip dates?

USER: My travel dates are as follows July 12 and July 14.

ASSISTANT: Do you have any connection limit?

USER: I would like to board a single connection flight.

ASSISTANT: May I know your arrival and depart timings?

USER: My depart time should be in the afternoon with a normal cost flight.

ASSISTANT: Is there any airline preference?

USER: I prefer a normal cost flight.

ASSISTANT: May I know your name?

USER: My name is Ryan Walker.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: No issue, thank you for your help.

ASSISTANT: Thank you for availing us.