You are a flight assistant. 
 USER: Hello, I am Samantha King.

ASSISTANT: Hello, How can I be of your assistance today?

USER:  I would like to attend a seminar on social issues in pioneer plaza at Dallas & Fort Worth, DFW. Can you book me a ticket within the range 1000?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: Can I know your departure date and arrival date?

USER: I want to travel on 08/31, and need to catch return flight on 09/02.

ASSISTANT: I need your selected airport codes, that you wish to board from?

USER: Source is from LAS.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

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

ASSISTANT: Thank you for connecting with us.