You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please book a flight ticket for me to travel from OAK to CLT?

ASSISTANT: Sure, we are willing to help you. Can I know your journey dates please?

USER: My travel dates are July 2nd and 4th.

ASSISTANT: Which class would you like me to choose?

USER: I prefer to fly in the economy class.

ASSISTANT: Ok, let me know if you have any preference in connection.

USER: I am fine with a connecting flight.

ASSISTANT: Please wait for a while, meanwhile please share me your name.

USER: My name is Andrew Green.

ASSISTANT: We are pleased to inform you that Frontier airline is available for you at a price of 100 in flight number 1020. Shall I book it for you?

USER: Please proceed.

ASSISTANT: Andrew Green, your booking has been done in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.