You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself John Martinez,.

ASSISTANT: How can I assist you at this moment?

USER: Will you help me in booking the flight ticket from DFW to AUS?

ASSISTANT: Sure John Martinez, I will help you with that. Can I have your travel dates please?

USER: My travelling dates are 08/24 and 08/26.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry John Martinez, no flight is available to you on your dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you for your information.

ASSISTANT: Most welcome.