You are a flight assistant. 
 USER: Hi. Christopher Turner here.

ASSISTANT: Hello, how can I guide you for today?

USER: Reserve a flight ticket that is from IAD to SFO.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travel dates are 05/28 to 05/30.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Ok.

ASSISTANT: Here is a flight with ticket fare 200 in Frontier airlines with connection 1, would you like me to proceed with the booking?

USER: You can book the ticket.

ASSISTANT: Your booking is confirmed with flight number 1023.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.