You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: My name is Sarah Carter.

ASSISTANT: Hello Sarah.

USER: I want to travel to Phoenix for my brother's birthday, could you help me in booking the ticket?

ASSISTANT: Sure, may I know your preferable dates of travelling?

USER: My preferable dates are from 11/20 to 11/22.

ASSISTANT: Could you please help me with your nearest airport codes for booking?

USER: The airport codes are from DFW to PHX.

ASSISTANT: Please wait a moment to check the availability of flights and I will revert to you.

USER: Sure.

ASSISTANT: I will appreciate your patience. Based on your details flight number 1015 from Frontier airline with the fare of 100 is available for you. Shall I proceed with it?

USER: Please proceed with the booking.

ASSISTANT: Ok, your ticket is booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for using our service, have a safe journey.