You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: My name is Dennis Jackson. We friends are planning to go to Denver, DEN to Seattle, SEA.

ASSISTANT: Please provide your travelling dates.

USER: The journey dates are from 09/19 to 09/21.

ASSISTANT: There is a flight available with price 200 and flight number is 1015. Would you like to confirm the booking?

USER: Sure, you can proceed booking my ticket.

ASSISTANT: Your booking is confirmed. Thank you for contacting us.

USER: You are welcome.