You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from MSP to DFW. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your name?

USER: Patricia Johnson.

ASSISTANT: Can I know your travelling dates?

USER: I want to travel in the flight on Mar 27 and Mar 29.

ASSISTANT: Do you have any other preferences?

USER: I want to return in evening time.

ASSISTANT: Can I know your connection limit?

USER: I want to travel in a connecting flight.

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

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.