You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a ticket from MSP to IAH, can you help me?

ASSISTANT: Please provide your trip dates.

USER: My travel dates are Nov 25 and 27.

ASSISTANT: Do you need any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: I prefer to travel in normal cost airline.

ASSISTANT: May I know your name for reservation?

USER: I am David Clark.

ASSISTANT: Sorry, there are no flights available on your routes.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for opting us.