You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret King.

ASSISTANT: How can I help you?

USER:  I want to give a surprise to my brother by attending his convocation day on 11/20, can you please help me in booking a flight ticket?

ASSISTANT: Yes, I can help you. Can you share me your travelling airport codes?

USER: My source is DFW and destination is LAS.

ASSISTANT: Can I know your return date?

USER: My flying date is 11/18.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connection.

USER: You can confirm it.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for the quick response in booking.

ASSISTANT: Thank you for contacting us.