You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am looking for a flight from DCA to IAH, can you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, my planned travel dates are Mar 13 and Mar 15.

ASSISTANT: Do you have any class preference?

USER: I need a flight in an economy class.

ASSISTANT: Do you have any connection preference?

USER: Yes, please look for a connecting flight.

ASSISTANT: May I know your name?

USER: Myself Matthew Perez.

ASSISTANT: Your booking is done with flight number 1009. Happy journey.

USER: That's fine, thank you for the information.

ASSISTANT: You are welcome, have a nice day.