You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Being the tourist, I want to Explore the Nature at Cockerel butterfly centre. For this, will you assist me in booking a flight ticket under the price limit of 200?

ASSISTANT: sure.

USER: Thank you.

ASSISTANT: Would you please let me know your airport codes?

USER: This Cockerel butterfly centre is at Houston, HOU. So this is my destination point. Minneapolis & St.Paul, MSP is my source point.

ASSISTANT: Ok, may I know your planned travel dates?

USER: On 01/10, I have to start my journey to reach the destination. The completion of my trip, I will return on 01/12.

ASSISTANT: May I know your name?

USER: I am Lisa Roberts.

ASSISTANT: Ok, there are no flights available on the dates your wanted to travel.

USER: No, problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for being helpful.