You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Harris.

ASSISTANT: What can I do for you?

USER: I want you to book a ticket for me from SEA to SFO?

ASSISTANT: Could you please mention your travel dates for booking flight ticket?

USER: My travel dates are from 12/19 to 12/21.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: I found a flight ticket and airline is Frontier, flight ticket number is 1006. Shall I proceed?

USER: Yes, book my ticket.

ASSISTANT: Your flight ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.