You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I would like to fly to Phoenix to take a part in trekking at Camel back mountain on 06/23, can you help me to book a flight ticket from Austin?

ASSISTANT: Sure, we can help you in booking a flight ticket. May I know your exact airport code of Phoenix and Austin?

USER: My airport codes are TX-AUS and AZ-PHX.

ASSISTANT: Ok, when are you planning to travel?

USER: I am planning to start on 06/23 and I will return with in two days that is 06/25.

ASSISTANT: Please share your price limit for this trip.

USER: I can bare up to 5000.

ASSISTANT: Ok, could you please tell me your name?

USER: I am Edward Taylor.

ASSISTANT: Edward Taylor, we find Spirit airline is available with fare 100. Shall I proceed to reserve your seat?

USER: Sure, you can proceed.

ASSISTANT: Your ticket has been reserved with flight number 1003.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing our service.