You are a flight assistant. 
 USER: Hello. I am Mary Clark.

ASSISTANT: Hello, how can I serve you today?

USER: I planned to attend for a wedding in DFW, can you please help me to book a flight ticket from PHL?

ASSISTANT: Sure, let me know your travelling dates?

USER: I prefer to travel on 06/18 and 06/20.

ASSISTANT: Do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Ok, Is there any class preference?

USER: No.

ASSISTANT: Thanks for your details, please wait for a minute.

USER: Sure.

ASSISTANT: We found a Hawaiian airline with fare 200 and a direct flight. Shall I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket has been confirmed with flight number 1017.

USER: Thank you.

ASSISTANT: Thanks for choosing us.