You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Stephen Thomas, want to travel from SFO to OAK. Please help me in booking my ticket.

ASSISTANT: Sure, can you please share me with your dates of travel?

USER: My travelling dates are from 08/03 to 08/05.

ASSISTANT: May I know your airline preference please?

USER: I can adjust in any of the class.

ASSISTANT: May I know your class preference please?

USER: No, there is no class preference.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I found a flight with the connecting flight of fare 100 with Southwest airline, are you ok with this booking?

USER: Make sure, my departing time should be in the evening with 1 connecting flight.

ASSISTANT: Sorry, there is no flight in the evening.

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

ASSISTANT: You are welcome.