You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Allen.

ASSISTANT: How can I assist you today?

USER: I am planning to visit Chicago, can you please book me a ticket from LAX to ORD?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: I would like to depart on Mar 23 and would like to return on Mar 25.

ASSISTANT: Ok, may I know in which class you prefer to travel?

USER: I prefer economy class ticket for this trip.

ASSISTANT: Fine, do you have any other specifications?

USER: I need connecting flight on this route.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: UA airlines is providing a flight on that route with ticket fare of 200 and 1 connection, shall I proceed for booking?

USER: Please book my ticket in this airlines.

ASSISTANT: I have successfully booked an economy class ticket in flight-1003, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.