You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Gary Evans. I have to attend a birthday party in Los Angeles, can you please book a flight ticket for me?

ASSISTANT: Sure, I will help you out.

USER: Thanks.

ASSISTANT: Can you please provide me your preferable dates?

USER: I want to departure on 04/28 and please book my return ticket also on 04/30.

ASSISTANT: May I know your flying airport codes?

USER: I would like to fly from SEA airport and destination airport is LAX.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with flight number 1007, would you like to proceed with this flight?

USER: May I know airline name?

ASSISTANT: You have Southwest airlines.

USER: Yes, I am comfortable with this airline, please book this flight ticket.

ASSISTANT: Ok, I have booked the ticket.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing our services.