You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Houston to meet my school friend, please help me in booking a ticket from IAD to IAH.

ASSISTANT: Sure, may I know your travelling dates, please?

USER: My planned travel dates are on May 30 and June 01.

ASSISTANT: May I know your name please?

USER: My name is Nicholas Wright.

ASSISTANT: Is there any airline preference?

USER: I prefer normal-cost airline.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I am comfortable with any timings.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: There are no flights on this route as per your travel dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.