You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you help me to book a flight ticket from LAS to MSP?

ASSISTANT: Sure, may I know your good name?

USER: I am Samantha Parker.

ASSISTANT: Could you please ensure your preferable dates?

USER: My trip dates are 21 to 23 of Feb.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.