You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: John Edwards here.

ASSISTANT: How can I assist you today?

USER: Could you book my ticket from PHL for a round trip?

ASSISTANT: Sure, I'll definitely help you with that. May I know your preferable travel dates please?

USER: I am leaving on 10/22 and returning on 10/24.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Southwest airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: Please book my ticket.

ASSISTANT: I have successfully booked your ticket with flight-1028, have a safe journey.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.