You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need to participate in a beauty contest, can you please book the ticket from SEA to SFO?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: Sure, I would like to depart from my source location on 29th Aug and I want to return back by 31st Aug.

ASSISTANT: Let me know your connection limit.

USER: I need direct flight only.

ASSISTANT: Do you have any specification?

USER: Yes, I prefer major airlines to travel.

ASSISTANT: May I know your name for further process?

USER: My name is Helen Phillips.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Oh! That's ok, thank you for giving the information anyways.

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