You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Catherine Martin here.

ASSISTANT: What service that you are seeking from our flight booking agency?

USER: I would like to visit Philadelphia and also planned to meet my friends there. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am oblige to help you. Can you please provide your planned dates of travelling?

USER: My departure date is 04/21 and return date is 04/23.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: My airport codes are from IAH to PHL.

ASSISTANT: Please wait a moment to check the flights availability in your route.

USER: Ok, I will wait.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 is provided by JetBlue airlines. Shall I proceed with this?

USER: That's perfect. Please proceed for booking the flight ticket.

ASSISTANT: Ok, your ticket has been booked in flight number 1007.

USER: Thanks for helping me.

ASSISTANT: Thank you for approaching us, hope you have a great journey.