You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ryan Mitchell here.

ASSISTANT: Ryan, how may I help you?

USER: I would like to travel to Philadelphia to attend a friend's marriage, can you book a flight ticket from SFO to PHL?

ASSISTANT: May I know your trip dates?

USER: Sure, my trip dates are from 04/05 to 04/07.

ASSISTANT: Flight 1016 of Southwest airlines is available for you.

USER: Please book my ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.