You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need your help in making my flight reservation from IAH to BOS, please help me.

ASSISTANT: Sure, may I know your planned trip dates?

USER: I have to depart on Apr 11th and return on Apr 13th.

ASSISTANT: Do you have any connection limit?

USER: I need single connection flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to return back in the morning.

ASSISTANT: Please forward your name.

USER: My name is Margaret Lee.

ASSISTANT: We found a connecting flight of fare 100 with airline Spirit and number is 1002. Can I proceed?

USER: Yes, you can book the ticket for me.

ASSISTANT: Your ticket has been confirmed in economy class and return is in the morning at 4:00 AM.

USER: Thank you very much.

ASSISTANT: Thank you for availing us.