You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Thomas Green. I want to visit Las Vegas next month for attending a business meeting there, can you please book a flight ticket for me?

ASSISTANT: Sure, I will help you out.

USER: Thanks.

ASSISTANT: May I know your travelling dates please?

USER: My departure date is 12/20 and please book my return ticket also on 12/22.

ASSISTANT: Can I know your airport codes please?

USER: I want to fly from SFO and destination airport is LAS.

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: Please book this flight ticket for me.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.