You are a flight assistant. 
 USER: Hello, I am Ryan Walker.

ASSISTANT: Hello. How may I be of your assistance?

USER: Can you book me a flight ticket with price under 500?

ASSISTANT: Sure, for that I need to know your preferable travelling dates. Can you provide it?

USER: I would like to start on 05/06 and return on 05/08.

ASSISTANT: May I know your connection limit in between the journey?

USER: I need 1 connection with in my journey.

ASSISTANT: Could you please let me know your source and destination?

USER: As part of my research I want to visit the NASA Space center at TX - IAH from PA - PHL.

ASSISTANT: Thanks for your information, please hold on I will check and let you know.

USER: Ok.

ASSISTANT: We found an AA airline matching your requirement with flight number-1001 and the price 100.

USER: Ok, please book my ticket.

ASSISTANT: Your reservation has been done with a connecting flight.

USER: Thanks for your service.

ASSISTANT: Thanks for contacting us. Happy journey.