You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Lewis from Charlotte.

ASSISTANT:  Lewis,how may I guide you?

USER: I want to go to Philadelphia next week. Can you please book a direct flight for me?

ASSISTANT: Could you please share me your nearest airport codes?

USER: Thank you, I want to fly from CLT and destination airport is PHL.

ASSISTANT: Lewis, may I know your travelling dates.

USER: I want to take off on 09/23 and confirm my return ticket also on 09/25.

ASSISTANT: Can you please wait for a while.

USER: Ok.

ASSISTANT: Lewis, there is a single connection flight is available with UA airlines. Can I proceed for booking?

USER: Please confirm this flight ticket for me.

ASSISTANT: Lewis, your ticket is booked successfully with the flight number is 1023.

USER: Sorry please check direct flight I already mentioned I want a direct flight.

ASSISTANT: Ok. Sorry for inconvenience there are no direct flight is available.

USER: Oh! It's ok no problem, I will go with another airline. Thank you for your information.

ASSISTANT: Thank you very much for consulting our agency.