You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anthony Gonzalez. I would like to book  a ticket to Washington DC, can you please help me out?

ASSISTANT: Anthony, I will help you with this.

USER: Thank you.

ASSISTANT: Please share your travel dates to proceed further.

USER: I am travelling on these dates 07/23 and 07/25.

ASSISTANT: Can I know your airport codes?

USER: I am flying from DCA to IAD.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: AA airlines with flight number 1004 is available for you.

USER: Ok, you can proceed with this flight.

ASSISTANT: Your booking is done with price 100.

USER: Thank you for your services.

ASSISTANT: Thank you for opting us.