You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Debra Clark.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket to Dallas, can you please help me out?

ASSISTANT: Sure Clark, can I know the travel dates please?

USER: I am travelling on these dates 07/16 and 07/18.

ASSISTANT: Could you provide the airport codes please?

USER: I am flying from IAD to DFW.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight in Delta airline with price 100, can I book it?

USER: Ok, you can proceed with this flight.

ASSISTANT: Your ticket has been booked with flight number 1018.

USER: Thank you for your services.

ASSISTANT: You are welcome.