You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you now?

USER: Joshua Lopez here. Please book a ticket from DEN to PHX, to meet my family.

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: I would like to travel on 11/18 and 11/20.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight 1004  in Delta airline has the price 400. Can I proceed with this booking?

USER: Please proceed.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you.

ASSISTANT: You are welcome.