You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Cynthia Smith here.

ASSISTANT: How can I assist you today?

USER: Can you book a flight ticket for my airport codes that is from PHL to IAH?

ASSISTANT: Please can I know your dates of your to book?

USER: The travel dates are from May 19 to May 21.

ASSISTANT: Ok, please can you let me know your specification?

USER: I do not have any preferences. You can search for the flight.

ASSISTANT: There is a flight ticket available with 0 connection limits and the flight number is 1000, the airlines is AA. Can I book a economy flight class?

USER: I am fine with the airlines. You can book the flight ticket.

ASSISTANT: The flight ticket is booked for the airfare 100 and the departure time 4:00AM.

USER: Thank you.

ASSISTANT: Thank you for choosing our agency.