You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you help me to book a connecting flight on Jan 27?

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My preferred airport codes are LAX and MSP.

ASSISTANT: Can you please share your return date?

USER: I would like to return on Jan 29.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I want to return at evening.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Virginia King.

ASSISTANT: Sorry, there are no flights available at your request.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for contacting us, have a nice day.