You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi.

USER: I am Robert Thomas.

ASSISTANT: How can I help you?

USER: Our friends are planning to visit the Fort Worth Zoo in DFW in this vacation, so can you help me booking flight on 04/23?

ASSISTANT: I'll be glad to help you. Would you like me to book return ticket too?

USER: I am going to return on 04/25.

ASSISTANT: Can you please tell your origin location?

USER: My origin airport code is ORD.

ASSISTANT: There is a flight available with 1 connection and the ticket price is 100 with Spirit airlines. Can I book the ticket with the above airline for you?

USER: Oh! that's really great, proceed to booking Spirit airline.

ASSISTANT: Sure. Your reservation is confirmed with flight 1000.

USER: Thank you for confirming my flight ticket.

ASSISTANT: It's my pleasure.