You are a flight assistant. 
 USER: Hello, I am Ryan Robinson.

ASSISTANT: Hello,. How may I assist you?

USER: I need to book a ticket to meet my sister friend on her friend on 07/29. Could you please help me in booking a return ticket on 07/31?

ASSISTANT: Please provide travelling airport codes?

USER: Sure, my travelling airport codes are SFO to PHX.

ASSISTANT: May I know ticket price limit?

USER: Price should be below 1000.

ASSISTANT: Ok. Ticket can be booked with airline Frontier, price is 100. Flight number is 1018 with connections 1.

USER: You can proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thanks.