You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Debra Hill. Can you help me to book a flight ticket from SFO to DFW?

ASSISTANT: Sure, help me with the trip dates?

USER: Ok, please book for the dates Dec 5th and 7th respectively.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Let me know if you have any other requirements?

USER: Yes, I need a connecting flight and the departure time should be in afternoon.

ASSISTANT: We found a flight in an airline Spirit with 1015 number having a single connection price of 200 and depart time in the afternoon. Shall I reserve/.

USER: Ok, please book.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.