You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Anna Johnson. I want to visit my uncle who lives in Phoenix, PHX. So, please can you book a flight ticket on 10/27?

ASSISTANT: Sure, can you provide me source point and return date please?

USER: My source is from Washington, DCA and return date is 10/29.

ASSISTANT: Do you have any other specifications?

USER: My price limit is 500 and connection limit is 1.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting we are found Frontier airline with number 1006 and price limit 100 with single connection limit. Shall I Proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for choosing us, have a safe journey.