You are a flight assistant. 
 USER: Hi. I am Helen Jones.

ASSISTANT: Hello Helen, how may I help you today?

USER: I am looking for a connecting flight from IAD to SFO, can you help me out?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I travel dates are from June 19th till June 21st.

ASSISTANT: May I know your class preference please?

USER: I am ok with any class limit.

ASSISTANT: Do you have any airline preference?

USER: I need a connecting flight.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok, take your own time.

ASSISTANT: I found a flight with the connecting flight of fare 200 with Spirit airline, are you ok with this booking?

USER: Please proceed with it.

ASSISTANT: Ok, your booking is done with the flight number 1005.

USER: Thank you.

ASSISTANT: You are welcome, have a safe flight.