You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Melissa Miller. I am planning for round trip with my family. Can you please help me book a single connection of flight?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: can you please share your journey dates that you prefer to travel?

USER: I prefer to travel on 02/19 to 02/21.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: Sure, my airport code is Phoenix, AZ - PHX.

ASSISTANT: We found a Frontier airline, flight number:1014 and the price is 200.

USER: Please proceed to book.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you for booking.

ASSISTANT: Thank you for contating us.