You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book a ticket from HOU to IAH?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: David Turner here.

ASSISTANT: Can you share me your travelling dates to book a flight ticket?

USER: My travel dates are 13 May and 15 May respectively.

ASSISTANT: Do you have any other specifications?

USER: I prefer for business class to travel.

ASSISTANT: Ok, wait for some time.

USER: Make sure that I need a connection flight.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Thank you for the help.

ASSISTANT: Thanks for approaching us.