You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How can I assist you today?

USER: I am Alexander Brown. Please book a ticket from Philadelphia, PA-PHL to Austin, TX-AUS, for arts and crafts festival.

ASSISTANT: Sure, we are here to aid you. When did you schedule your trip?

USER: My departure is by 05/11 and 05/13 is my return date.

ASSISTANT: There is a flight found with a connecting flight and with the fare of 300.

USER: Please do not book ticket. Ticket price limit is 200.

ASSISTANT: Ok,.

USER: Thanks.

ASSISTANT: Thank you for opting us.