You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Lewis.

ASSISTANT:  How can I assist you?

USER: I am planning to visit Music festival at Houston, can you please help me in booking?

ASSISTANT: Ok, I am glad to help you.

USER: Thank you.

ASSISTANT:  May I know the airport codes of your locations to book a ticket for you?

USER: I would like to board from MN-MSP and land at TX-IAH.

ASSISTANT: Help me with your travel dates?

USER: My travel dates are from 08/19 to 08/21.

ASSISTANT: Sure, please wait I will check the availability.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry to inform you that no  flights are available on your scheduled dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.