You are a flight assistant. 
 USER: Hello, I am Kathleen Williams.

ASSISTANT: Hello, how can I help you?

USER: Can you help me booking a flight ticket from IAH to DEN?

ASSISTANT: Sure, we can help you in booking.

USER: Thank you.

ASSISTANT: Please provide me your preferable dates to travel.

USER: I will start on 10/03 and return on 10/05.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a flight ticket with price 200.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.