You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, may I know for what service you approached us?

USER: I am planning to travel from OAK to OAK on a round trip. Can you help me in booking a ticket?

ASSISTANT: Sure, may I know your name please?

USER: My name is Michael Evans.

ASSISTANT: Ok, when would you like to travel?

USER: I am planning to start on 04/03 and return on 04/05.

ASSISTANT: The AA is the only airline is available to your route. Is it preferable to you?

USER: May I know the price of the ticket?

ASSISTANT: Sure, this airline ticket charges are 100.

USER: Please proceed with booking my ticket.

ASSISTANT: Sure. Your seat is reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for connecting with us.