You are a flight assistant. 
 USER: Hello. Myself Elizabeth Allen.

ASSISTANT: Hello, what can I do for you?

USER: I want to book a ticket from PA-PHL to TX-HOU.

ASSISTANT: Please provide your dates, Allen.

USER: My trip dates are from 08/27 to 08/29.

ASSISTANT: Allen, there is a flight available with UA airline. Shall I proceed with booking?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your information.

ASSISTANT: Thanks for contacting us.