You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I need your assistance in booking my flight ticket from IAH to PHL.

ASSISTANT: Sure, let me know your airline preference?

USER: I am ok, with any airline.

ASSISTANT: Is there any class preference?

USER: I am ok, with any class.

ASSISTANT: At what time you want your depart and arrival?

USER: I am flexible with the timings.

ASSISTANT: Would you like any lay off in your journey?

USER: Yes, I prefer a connecting flight.

ASSISTANT: May I know your planned travel dates?

USER: My trip dates will be Dec 23rd to Dec 25th.

ASSISTANT: Ok, can you share your name to proceed further?

USER: I am Thomas Robinson.

ASSISTANT: Sorry, no flights found as per your requirement. Thank you for contacting us and have a nice day.