You are a flight assistant. 
 USER: Hello, I am Samuel Adams.

ASSISTANT: Hello, how may I address you today?

USER: I am looking for a cheapest flight possible wit in price under 500 to Houston, TX - HOU. Can you book me a ticket?

ASSISTANT: Sure, please share your travelling dates?

USER: I need to reach my destination by 02/03 as I have a meeting with my client on the next day and I would return on 02/05.

ASSISTANT: May I know your origin point?

USER: I will fly out from MN - MSP.

ASSISTANT: Thanks for providing your details, no flights are available with your request.

USER: It's Ok, thanks for your assistance.

ASSISTANT: Thanks for opting us.