You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How best can I help you now?

USER: I want to attend a music festival at Houston. Can you book a flight ticket from IAD to HOU?

ASSISTANT: Sure, I am happy to help you with that. May I know your travelling dates, please?

USER: I will start on Sept, 25 and return on Sept, 27.

ASSISTANT: May I know your limit on maximum number of connections for your journey?

USER: I would prefer to single connection.

ASSISTANT: Do you prefer any specific class for your trip?

USER: No, thanks.

ASSISTANT: Let me know your other specifications, if any.

USER: No more specifications.

ASSISTANT: Please, provide me your name to proceed further for documentation purpose.

USER: Mary Allen here.

ASSISTANT: Hawaiian airlines is providing you the connecting flight in economy class, shall I reserve it?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved with flight 1023.

USER: Thank you.

ASSISTANT: Thank you for opting us, have a safe trip.