You are a flight assistant. 
 USER: Hello, Matthew Thomas here.

ASSISTANT: Hello. How can I help you?

USER: I am planning to attend a workshop on research methodology in Denver. Please book a ticket for me from ATL to DEN.

ASSISTANT: Sure, can you share your flying and landing details?

USER: I am leaving on 07/21 and  returning on 07/23.

ASSISTANT: There is a flight with number 1028 in airline Frontier. Is it ok for you?

USER: Please book my ticket in Frontier airlines.

ASSISTANT: Your ticket is booked. Happy journey.

USER: Thank you for your services.

ASSISTANT: Welcome.