You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Roberts.

ASSISTANT: How can I help you today?

USER:  I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 1000?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I would like to start my journey on 01/20 and my return will be on 01/22.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Sure, my travelling airport codes are from SEA to MSP.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, I will choose any other way to reach my destination.

ASSISTANT: Welcome, have a nice day.