You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Sarah Walker.

ASSISTANT: Sure, I will help you out.

USER: I want to visit Los Angeles to meet my childhood friends there, can you please book a flight ticket from Dallas?

ASSISTANT: May I know your travelling dates please?

USER: I want to departure on 04/12 and please book my return ticket also on 04/14.

ASSISTANT: Can I know your airport codes too?

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

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: That's great, please confirm this flight ticket for me.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing our services.