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

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit Houston, Can you help me with booking a flight ticket with price under 200?

ASSISTANT: Sure, Could you please provide me your airport codes?

USER: Airport codes are MSP-IAH.

ASSISTANT: On which dates you wish to travel?

USER: I wish to travel on dates 03/09 and 03/11.

ASSISTANT: DO you need any halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: Ok, no issues. Thanks you.

ASSISTANT: Have a good day.