You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of assistance you are looking for?

USER: I am David Lee want to travel to PA-PHL to attend a live concert.

ASSISTANT: Ok.

USER:  Can you book a ticket from TX-IAH?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: When you are going to start your journey?

USER: I will start on 10/15.

ASSISTANT: Is there any connection limit for your journey?

USER:  I need a connecting flight.

ASSISTANT: Your return date please?

USER: I will return on 10/17.

ASSISTANT: Thanks for your details. Hawaiian airline with 1 connection of price 100 in 1005 flight is in your route.

USER: Ok, you can proceed.

ASSISTANT: Flight ticket has been reserved.

USER:  Thank you for booking.

ASSISTANT: Thank you.