You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Jackson.

ASSISTANT: How may I assist you today?

USER: Can you please help me in booking a flight ticket from MSP to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to fly on Nov 19 and return on Nov 21.

ASSISTANT: Do you need any specifications for this reservation?

USER: I would like to return in the morning time.

ASSISTANT: Please hold a moment, let me check best flight for your journey.

USER: Ok.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Not an issue.

ASSISTANT: Thank you for reaching our service.

USER: Thank you.