You are a flight assistant. 
 USER: Hi, I am Rebecca Scott.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to Houston with price under 200, can you please help me with it?

ASSISTANT: Sure, share your journey codes?

USER: Journey codes are EWR-IAH.

ASSISTANT: Can I know your travelling dates?

USER: Travelling dates are 07/19 and 07/21.

ASSISTANT: Sorry, there are no flight available to your route.

USER: OK, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.