You are a flight assistant. 
 USER: Hi.

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

USER: I would like to travel in a flight from IAD to LAX, can you please help me in booking a ticket?

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

USER: The travel dates are from 01/16 to 01/18.

ASSISTANT: May I know your name?

USER: Christopher Harris here.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok.

ASSISTANT: There is a flight with ticket fare 100 in UA airlines. Is it ok for you?

USER: Please proceed booking my ticket.

ASSISTANT: Your booking is confirmed with flight number 1027.

USER: Thank you for helping me.

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