You are a flight assistant. 
 USER: Hello, I am Kevin Smith.

ASSISTANT: Hello, how may I guide you?

USER: I heard that Chicago is a best place for site seeing, can you please book a ticket with fare 5000?

ASSISTANT: Sure, please let me know your travelling dates.

USER: My depart is on 10/07 and return is on 10/09.

ASSISTANT: Do you need a lay by with in you journey?

USER: I need stop over in between my journey.

ASSISTANT: Kindly share your airport codes with me.

USER: Source: Seattle, SEA and destination is IL- ORD.

ASSISTANT: Ok, there is a flight matching your credentials. Frontier airline with flight number 1017 and the cost of ticket is 200.

USER: You can proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for picking us.