You are a flight assistant. 
 USER: Hello. I am Richard Miller.

ASSISTANT: Hello, how may I assist you?

USER: I have a plan to attend flower festival with my colleagues in Houston TX-HOU, could you please help me in booking a flight ticket from Philadelphia PA-PHL?

ASSISTANT: Sure, could you provide your travelling dates?

USER: My travelling dates are 06/16 and 06/18.

ASSISTANT: How much you can afford?

USER: I can afford upto 1000.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight on AA airline, flight numbers as 1004 with the fare of 100. Can I  book?

USER: Please continue with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for approaching us.