You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know what kind of service you are looking for?

USER: Mary Lopez here. I want to meet my twin sister to celebrate our birthday, could you book my ticket from IAH to DEN?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My itinerary dates are July 18 and July 20.

ASSISTANT: Do you need any lay by in between journey?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight found in AA airlines of flight number 1015 and economy class. Shall I proceed for booking?

USER: Please book my ticket.

ASSISTANT: Your ticket has been booked with a connecting flight.

USER: Thank you for assisting me.

ASSISTANT: Thanks for approaching us.