You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Lopez here.

ASSISTANT: How can I aid you today?

USER: I want to attend an event in Houston and also planned to meet my friend there. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you in booking the ticket as per your required specifications.

USER: Thanks for that.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are from 06/28 to 06/30.

ASSISTANT: Can I know your airport codes too so that I can check for availability of flights?

USER: My airport codes are from PHL to HOU.

ASSISTANT: Please wait for a while so that I will check the flights.

USER: Ok, I will wait for your response. Could you please tell me the flight availability and price?

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Ok, your ticket has been booked with flight number 1003.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.