You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please book a flight which is having return time in the evening.

ASSISTANT: Sure, may I know the planned travel dates?

USER: Sure, I want to travel on May 14 and intend to return on May 16.

ASSISTANT: Please provide me the airport codes.

USER: My airport codes are SFO and PHL.

ASSISTANT: May I know the other specifications?

USER: I need a flight with single connection.

ASSISTANT: May I know the name?

USER: Dorothy Rodriguez.

ASSISTANT: Here, I found a flight with 1 connection and airfare is about 100. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: In an economy class, your ticket has been confirmed for the flight 1003 in Spirit Airlines.

USER: Thank you.

ASSISTANT: Thank you for reaching us.