You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Myself Donald Hernandez, can you assist me to book a flight ticket from PHL to DFW?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: Ok, my departure date is 06/25 and return date is 06/27.

ASSISTANT: Wait a moment please.

USER: Yes, will wait take your own time.

ASSISTANT: UA airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Please book it.

ASSISTANT: Donald Hernandez, your ticket is booked with flight number 1004.

USER: Thank you for assisting me.

ASSISTANT: Thank you, have a safe journey.