You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: To enjoy Fun Filled vacation, I want to visit Houston, TX - HOU, can you help me to book a ticket with a fare of 200?

ASSISTANT: Sure, I will aid you, may I know your travelling dates?

USER: Sure, my journey dates are 04/16 and 04/18.

ASSISTANT: Could you please help me with your source code?

USER: Sure, It is a round trip.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: May I know your name for booking?

USER: Myself Raymond Nelson.

ASSISTANT: Sorry Nelson, no flights found on your requested dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.