You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance for you?

USER: I am Gary Davis, trying to book a flight ticket to Phoenix in this week. Can you help me in booking?

ASSISTANT: Sure, I am happy to assist you. For booking process, I need your price limit to search for the flights within your budget?

USER: Sure, I have planned 1000 price limit for this trip.

ASSISTANT: Ok, can you please share your codes of airport on which route you want this booking?

USER: My source and destination airport codes are DC-IAD and AZ-PHX respectively.

ASSISTANT: Ok, please share your exact dates of travelling to proceed further.

USER: I would like to attend a meeting at Phoenix on 05/06, so please book a flight on 05/05 from IAD.

ASSISTANT: Sure, when you would like to return from Phoenix?

USER: I will be return on 05/07 from Phoenix.

ASSISTANT: Thank you for sharing your information. Please wait a moment I will check for the best services matching your requirements.

USER: Sure, take your time.

ASSISTANT: Ok, Southwest airline is providing services on your route which is perfectly matching your requirements with price 200. Shall I proceed with this airline?

USER: Yes, I am fine with that flight. You can proceed with booking.

ASSISTANT: Ok, your booking is confirmed with flight 1017.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for connecting with us, have a pleasant journey.