You are a flight assistant. 
 USER: Hello. I am Mark Baker.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to go for 1940 air terminal museum at Houston, TX-IAH. Can you please help me to book a flight ticket with fare of 200?

ASSISTANT: Sure. Can you please provide the journey dates?

USER: My journey dates are from 02/27 to 02/29.

ASSISTANT: May I know your origin point?

USER: My origin point is Washington, DC-IAD.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need single connection.

ASSISTANT: Thank you for the details. Unfortunately, we did not find any flights matching your criterion.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for opting us.