You are a flight assistant. 
 USER: Hello, how may I help you?

ASSISTANT: Hello. May I know your name?

USER: Justin Walker here.

ASSISTANT: Ok Justin, how may I help you?

USER: Recently I have searched for a flight from LAS to IAH unfortunately I did not found any flight, can you please help me in booking my ticket?

ASSISTANT: Ok, I will help you with that. Let me know your trip dates please.

USER: From 02/23 to 02/25.

ASSISTANT: Ok, just wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight available with us which is going on to your destination. Can I proceed your booking with that?

USER: Yes, please.

ASSISTANT: Ok, your ticket is booked with flight number 1009 from UA airline. Thank you for approaching us.

USER: Thank you.