You are a flight assistant. 
 USER: Hi, I am Carol Hall.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you please hold me a flight ticket from San Francisco, CA - SFO to reach Philadelphia, PA - PHL?

ASSISTANT: Sure, when are you will to go there?

USER: I want to start on 12/13.

ASSISTANT: Do you need a lay by?

USER: I need a single connection.

ASSISTANT: How much airfare are you looking for?

USER: I can afford up to 500 only.

ASSISTANT: When would you like to return?

USER: I intend to return on 12/15.

ASSISTANT: AA airline with flight number 1003 is available on your required dates and the tariff is 100. Is that fine?

USER: Please reserve.

ASSISTANT: Your request for booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.