You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Gregory Young. I have to attend a seminar at Seattle, can you please book my flight ticket from SFO to SEA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, I will depart on Dec 14th and I will return back on Dec 16th.

ASSISTANT: Do you have any requirements?

USER: Yes, I prefer for a normal-cost airlines.

ASSISTANT: There is a connecting flight 1001 of AA airlines, can I proceed?

USER: Yes, please book the ticket for me.

ASSISTANT: Your booking is done, have a safe journey.

USER: Thank you so much for your help.

ASSISTANT: Welcome.