You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: This side Gregory Clark.

ASSISTANT: Can you please tell me how may I help you?

USER: Due to an emergency, I have to travel to Las Vegas-LAS to take care of the patient in my hospital, can you book a flight ticket from PHL?

ASSISTANT: Sure, I will help you.

USER: Yes, thank you.

ASSISTANT: Can you please tell me your travelling  dates?

USER: I would like to move that place on 03/21 and return back to my region back on 03/23.

ASSISTANT: Ok, can you please wait a minute?

USER: Sure.

ASSISTANT: The Hawaiian airlines is found with connection limit 1 and price is 100. Can I book your ticket?

USER: Yes, do proceed.

ASSISTANT: Ok, your ticket is booked with the flight number 1003.

USER: I am happy with your great service. Thank you so much.

ASSISTANT: You are welcome. Thank you for consulting us.