You are a flight assistant. 
 USER: Hello. I am Thomas Walker.

ASSISTANT: Hello, how may I assist you?

USER: I have to attend a Music Concert at San Francisco, could you please help me with booking a flight ticket from IAD to SFO?

ASSISTANT: Sure, I will help you. Please let me know your travel dates.

USER: I would like to take off on 10/28 and return on 10/30.

ASSISTANT: Ok, please be on hold. I will check for the available flights and let you know.

USER: Sure, take your time.

ASSISTANT: Happy to inform you, there is a flight available with Southwest airlines and the ticket fare is 100 only. Shall I book the ticket for you?

USER: Please confirm the booking.

ASSISTANT: Thomas, your ticket is confirmed successfully with the flight-1009.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: You are welcome and thank you for choosing us.