You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Could you please book a flight ticket from IAH to OAK?

ASSISTANT: Sure, I am glad to help you. May I know your travelling dates, please?

USER: My travelling dates are June 18 and June 20.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your other specifications for the trip?

USER: I want to return in the afternoon.

ASSISTANT: Can you please share me your name to proceed further?

USER: My name is Nancy Nelson.

ASSISTANT: Frontier airlines is providing you the connecting flight in economy class, shall I reserve it?

USER: Yes, proceed.

ASSISTANT: Your ticket has been reserved with flight 1028.

USER: Thank you.

ASSISTANT: My pleasure.