You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Deborah Parker.

ASSISTANT: How can I assist you?

USER: I would like to attend Global Environmental Conference in Benaroya hall, which is at Seattle, SEA with my sister. Could you please help me with reserving a flight ticket on 06/21?

ASSISTANT: Please provide your boarding airport code.

USER: Sure, I intend to board from Dallas & Fort Worth, TX-DFW.

ASSISTANT: May I know your return date?

USER: I want to return on 06/23.

ASSISTANT: Connecting flight can be booked with airline Hawaiian having price 100. Shall I book a ticket?

USER: Yes, please proceed.

ASSISTANT: Ticket is booked with flight number 1010.

USER: Thank you for your assistance.

ASSISTANT: Thanks.