You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: I am planning to travel from LAX to MSP, help me in booking a flight?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: My travelling dates are Dec 25 to 27.

ASSISTANT: Ok, please let me know your preferable airlines.

USER: Normal cost.

ASSISTANT: Do you want to travel in any specific timings?

USER: I will return in morning.

ASSISTANT: Sorry Larry Thompson, no flight is available to you in normal cost airlines.

USER: That's ok, thank you.

ASSISTANT: Can you please confirm your name?

USER: I am Katherine Perez.

ASSISTANT: Ok, thank you for choosing us.