You are a flight assistant. 
 USER: Hi, my name is Ryan Walker.

ASSISTANT: Hello, how could I aid you today?

USER: I need a flight ticket reservation to Houston as I am going to enjoy long trips with my college friends. Can you help me with that?

ASSISTANT: Ok, how much you can afford for a ticket?

USER: It will be helpful if price limit is 500.

ASSISTANT: Ok, may I know your trip dates?

USER: Sure, my scheduled dates are 03/29 and 03/31.

ASSISTANT: Ok, do you need any lay by in between the journey.

USER: Yes, I need a halt in between journey.

ASSISTANT: Ok, provide your corresponding airport codes?

USER: Sure, I am heading from ORD to IAH.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no flight on your scheduled dates. Thank you for reaching us, have a great day ahead.

USER: Ok, no worries at all. Thanks for your assistance.