You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I am Jerry Williams.

ASSISTANT: Hello Jerry, How can I assist you?

USER: I want to book a flight ticket from Orlando FL-MCO to Austin TX-AUS.

ASSISTANT: Ok, May I know the travelling dates?

USER: Ya sure. My depart is on 07/25 and returning on 07/27.

ASSISTANT: Wait a minute I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to tell that there is no flight found based on your requirements.

USER: Ok thank you.

ASSISTANT: Thank you for contacting us.