You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How shall I help you?

USER:  I would like to take my children to Providence Children's Film Festival at Phoenix, PHX, can you please help me in booking.

ASSISTANT: Please let me know your travel dates?

USER: I want to travel from 10/14 and to return on 10/16.

ASSISTANT: May I know your origin airport code?

USER: My origin is at Houston, TX-IAH.

ASSISTANT: Please provide your name?

USER: I am Matthew Jackson.

ASSISTANT: No flight found with your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks.