You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Karen Hall here.

ASSISTANT: How can I assist you today?

USER: I am looking for a single connecting flight to New York. Can you book the flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: The travel dates are from Jan 21 to Jan 23.

ASSISTANT: Could you please help me with the airport codes?

USER: Yes, the airport codes are from MSP to LGA.

ASSISTANT: Do you have any class preference?

USER: No, that is it.

ASSISTANT: Karen Hall, I am sorry to inform you that there is no flight available at your request.

USER: Ok, that is not a problem. Thank you.

ASSISTANT: You are welcome. Thank you for contacting us.