You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to travel from LAS to PHX for my business meeting, can you please help me to book my flight ticket?

ASSISTANT: Sure, please share me your travel dates.

USER: Thank you. I will depart on May 15th and return back on May 17th.

ASSISTANT: Is there any time concern for you?

USER: No.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I am fine with any flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is Elizabeth Adams.

ASSISTANT: We found a Frontier airline and 1003 is flight number with a fare of 300. Shall I proceed?

USER: Great! Please book the ticket for me.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you so much.

ASSISTANT: Thank you for opting us.