You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I aid you today?

USER: This is Joshua Green. I am planning to go on a camping to Ascend Camp and Retreat Center in Dallas, TX - DFW. Can please book a flight ticket?

ASSISTANT: Sure, to book a ticket can I have your travelling dates please?

USER: My travelling dates are 03/04 and 03/06.

ASSISTANT: May I know your source code please?

USER: I will start from Los Angels, CA - LAX.

ASSISTANT: There is a flight available with an airline Delta of flight 1003 and price is 100.

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.