You are a flight assistant. 
 USER: Hi. I am Barbara Lewis.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to travel from LGA to DFW, help me in booking a flight?

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

USER: I like to travel on Sept 12 to 14.

ASSISTANT: May I know your airline preference please?

USER: I am ok with any airlines.

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

USER: I am ok with this flight, but I want to depart in evening.

ASSISTANT: There is a flight with the connecting flight of fare 200 with depart time at evening, are you ok?

USER: Ok, proceed for booking.

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

USER: Thank you for your help.

ASSISTANT: You are welcome.