You are a flight assistant. 
 USER: Hello, I am David Rodriguez.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to visit Denver art museum in Denver, can you please help me to book a flight ticket with 200?

ASSISTANT: Sure, I am mirthful to help you. Is there any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Kindly mention your travelling dates?

USER: My journey dates are from 04/08 to 04/10.

ASSISTANT:  Can you please provide me your airport abbreviates?

USER: I am travelling from HOU to DEN.

ASSISTANT: Ok, wait for a minute, I will revert you with the availability.

USER: Ok.

ASSISTANT: Thanks for your time. Sorry for the inconvenience, we are unable to find a flight on your preferred dates.

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

ASSISTANT: Thank you for reaching us, Have a great day.

USER: Thank you.