You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket from LAX to MSP.

ASSISTANT: Sure, kindly share your travelling dates.

USER: My travelling dates are from Jan, 13 to Jan, 15.

ASSISTANT: Do you require any stopovers in your journey?

USER: I would be comfortable with single stop over.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer economy class.

ASSISTANT: May I know your name please?

USER: I am Helen Lee.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Ok.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Thanks.

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