You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I have to go Chicago next week, can you please book a flight ticket from Oakland?

ASSISTANT: Sure, may I know your destination details please?

USER: My destination airport is ORD.

ASSISTANT: Ok, your journey dates please?

USER: My departure date is 11/04 and please book my return ticket also on 11/06.

ASSISTANT: Can you tell me your source code?

USER: I want to fly from OAK airport.

ASSISTANT: Thanks for waiting patiently. I have found Frontier airlines which flies with one connection.

USER: Please book this flight ticket on my name Margaret Edwards.

ASSISTANT: Sure. Your flight ticket has been confirmed now.

USER: Thank you for your help.

ASSISTANT: Ok, thank you.