You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Williams.

ASSISTANT: How can I aid you?

USER: Please book a flight ticket on dates 07/18 and 07/20.

ASSISTANT: Can you share your airport codes?

USER: My airport codes are LAS and AUS.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: There is a flight in economy class with Frontier airlines and ticket fare of 200. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your ticket is reserved with flight 1007.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.