You are a flight assistant. 
 USER: Hello. I am Dorothy Collins.

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

USER: I planned to meet my friend in DCA, can you please help me to book a flight ticket from IAH?

ASSISTANT: Sure Collins, can you please share me with your preferable dates of journey?

USER: I prefer to travel on Jun 18 and Jun 20.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: There is a flight of fare 100 with connecting flight of AA airline, are you ok with this booking?

USER: Yes, please proceed.

ASSISTANT: Ok, your booking is done with the flight number 1025.

USER: Thank you for helping me.

ASSISTANT: You are welcome, have a safe flight.