You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Brandon Collins here, please book me a ticket to Dallas as a part of meeting a client.

ASSISTANT: Sure, I will help you with booking. Please provide me your airport codes.

USER: My airport codes are from MSP to DFW.

ASSISTANT: On which dates do you like to travel?

USER: My journey dates are from 08/15 to 08/17.

ASSISTANT: Ok, please give me a moment, I will inform you soon. Thank you for waiting.

USER: Sure, check that flight has price limit of 500.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.

ASSISTANT: You are welcome. Have a good day.