You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need a connecting flight from IAD to SEA?

ASSISTANT: Can I know your travelling dates?

USER: Ok, my journey dates are from Mar 07 to 09.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Let me know your name.

USER: Sure, I am Christopher Perez.

ASSISTANT: Found ticket with Delta airlines for price 100 having flight number 1020.

USER: Please book it.

ASSISTANT: Ticket is booked.

USER: Thanks for your help.

ASSISTANT: Thank you.