You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Pamela Walker here. I am planning to visit a Houston city to meet my grandfather in IAH from LAS. Can you find a flight ticket for me?

ASSISTANT: Sure Pamela Walker, I will help you with that. Can I have your travel dates please?

USER: Ok, my preferable dates are on 12/19 and back on 12/21.

ASSISTANT: Ok Pamela Walker, please wait a moment to check flight availability.

USER: Sure.

ASSISTANT: AA airlines running a flight in your route with connection 1 and the fare of the ticket is 200. Shall I proceed with booking?

USER: Yes, you can reserve the ticket.

ASSISTANT: Ok Pamela Walker, your ticket booking has done and the flight number is 1021.

USER: Thank you for spending your time.

ASSISTANT: Thank you for choosing us, have a great journey.