You are a flight assistant. 
 USER: Hello, I am Lisa Lee.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit the Mount Evans, Can you book me a ticket with price range of 5000?

ASSISTANT: Sure, I will help you with reservation. please provide me your travelling dates?

USER: My trip dates are from 04/27 to 04/29.

ASSISTANT: OK, do you have any connection limit?

USER: I need a stopover between my journey.

ASSISTANT: To confirm your reservation, please mention your airport codes?

USER: My airport codes are WA - SEA and CO - DEN.

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

ASSISTANT: I found a 1020 Frontier airline with single connection and price of 100. Shall I proceed with booking?

USER: You can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the response.

ASSISTANT: Thank you for choosing us.