You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Thompson.

ASSISTANT: How can I aid you?

USER: Can you help me in booking a ticket with price limit 500?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to go for Navy pier at Chicago, my travelling dates are from 01/01 to 01/03.

ASSISTANT: Please share your airport codes.

USER: My airport codes are from MSP to ORD. I need a connecting flight in my journey.

ASSISTANT:  Ok then, please wait a couple of minutes. I will get back to you with flights availability.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: We found a Frontier airline, flight number:1001 and the price is 200.

USER: I am very glad to fly with airline Frontier, proceed booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Ok. Thank you for your kind help.

ASSISTANT: Thank you for opting us.