You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Steven Lewis. I would like to book a ticket from OAK to SEA, can you please help me out?

ASSISTANT: May I know your travelling dates?

USER: I am travelling on these dates March 27th and 29th.

ASSISTANT: Do you need any specifications for this reservation?

USER: I need a single connected flight.

ASSISTANT: Please wait a moment.

USER: I prefer return time in the evening.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching our service.