You are a flight assistant. 
 USER: Hello, I am Melissa Collins.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight to Philadelphia, with price 200. can you help me with it?

ASSISTANT: Sure, could you please provide your travel dates?

USER: I would like to travel from 09/23 to 09/25.

ASSISTANT: Ok, please mention your city codes.

USER: My airport codes are LAS-PHL.

ASSISTANT: Ok, there is a flight matching your requirements with 1 connection.

USER: Ok, you can proceed with booking.

ASSISTANT: Ok, your booking is done with Spirit airline with number 1004 having price 100.

USER: Thanks for the help.

ASSISTANT: Thanks for reaching us. Have a nice day!.