You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Young.

ASSISTANT: What help that you need form our end?

USER: Can you help me in booking from DFW to IAH, to meet my school teacher?

ASSISTANT: Sure, I am oblige to help you in that plane ticket booking. Can you please share your moving dates for better searching of flight?

USER: Sure, my travelling dates are from 04/21 and 04/23.

ASSISTANT: Give me a moment.

USER: Sure, get back with good airline services.

ASSISTANT: Thank you for your patience, no airlines is providing a flight for you to reach your destination.

USER: It's ok, I will concern another agency to full fill my trip. Thanks for your information and service.

ASSISTANT: Our work is to help the customers who will reach us. have a nice day.