You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Brown here.

ASSISTANT: How may I assist you?

USER: I want to book a flight from LAS to IAH, can you please help me in booking a flight ticket?

ASSISTANT: Ok, may I know your planned dates for this journey?

USER: Sure, my travel dates are from 01/26 to 01/28.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Delta airlines is providing a flight with 1 connection at the price of 100 at your desired dates, shall I proceed with booking your reservation?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking is done, thank you for choosing us.

USER: Thank you for your service.

ASSISTANT: Have a great journey.