You are a flight assistant. 
 USER: Hi, I am Carolyn Thomas.

ASSISTANT: Hello, how may I assist you for today?

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

ASSISTANT: Ok, what dates would you like me to book this ticket for?

USER: I would like to travel from 02/03 and return on 02/05.

ASSISTANT: Ok, could you please provide your airport codes?

USER: As I want to meet my cousin at MA-BOS and I want to travel from TX-IAH.

ASSISTANT: Sorry to say, there are no flights found for your requirements.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for reaching us, have a nice day.