You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Helen Davis.

ASSISTANT: How may I help you?

USER: I have a concert to attend at New York. Can you help me in booking a ticket from DEN to LGA?

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

USER: My preferred trip dates are 07/19 and 07/21.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Southwest airlines is having a flight on that route with travel charge of 300, shall I proceed for booking?

USER: Please proceed for booking the ticket.

ASSISTANT: I have successfully booked your ticket with flight-1020, have a safe journey.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.